Postcrossing
參考

1 2  （英文） . Postcrossing.com. 2004–2014  [2014-08-03]. （原始内容存档于2014-07-03）.
1 2 3 4 5  （英文） . Postcrossing.com. 2020  [2020-11-22]. （原始内容存档于2019-07-02）.
1 2 3 4  （英文） . Postcrossing.com. 2004–2014  [2014-07-26]. （原始内容存档于2014-07-03）.
↑  （英文） . Postcrossing.com. 2005  [2009-01-01]. （原始内容存档于2011-02-22）.
↑  129860, Sho. . BBC H2G2. 2006-05-08  [2009-01-01]. （原始内容存档于2008-12-05）.
1 2 3 4 5  （英文） . Postcrossing.com. 2020  [2020-11-22]. （原始内容存档于2016-02-02）.
1 2 3 4 5 6 7 8 9  （英文） . Postcrossing.com. 2024  [2024-07-28]. （原始内容存档于2024-07-28）.
↑  （英文）About Postcrossing... （页面存档备份，存于）
↑  Crews, Barbara. . about.com. 2007-07-01  [2009-01-01]. （原始内容存档于2011-07-16）.
↑  Magalhães, Paulo. . postcrossing.com.   [2009-01-01]. （原始内容存档于2009-01-22）.
↑  Faxon, Hilary. . shanghaiist.com. 2008-07-17  [2009-01-01]. （原始内容存档于2012-02-17）.
↑  Widmer, Laurent.  (PDF). Union Postale. 2008  [2009-01-01].  []
↑  （英文）The Postcrossing team Archive.is的存檔，存档日期2013-04-27
↑  （英文）Postcrossing History （页面存档备份，存于）
↑  107.20.159.106
1 2  （英文） Ana Campos. . Postcrossing.com. 2008-02-15  [2014-07-27]. （原始内容存档于2013-04-27）.
↑  （英文）Postcrossing gallery & comments Archive.is的存檔，存档日期2013-04-27
↑  （英文） Ana Campos. . Postcrossing.com. 2017-11-08  [2017-11-08]. （原始内容存档于2016-02-02）.
↑  （英文） Ana Campos. . Postcrossing.com. 2008-04-11  [2014-07-18]. （原始内容存档于2014-07-24）.
↑  （英文） Ana Campos. . Postcrossing.com. 2012-01-27  [2014-07-18]. （原始内容存档于2014-08-24）.
↑  （英文） Ana Campos. . Postcrossing.com. 2013-10-29  [2014-07-18]. （原始内容存档于2014-07-30）.
↑  （英文） meiadeleite. . Postcrossing.com. 2015-06-02  [2017-11-06]. （原始内容存档于2017-10-08）.
↑  （英文） meiadeleite. . Postcrossing.com. 2015-02-13  [2017-11-06]. （原始内容存档于2017-10-08）.
↑  （英文） meiadeleite. . Postcrossing.com. 2018-12-27  [2019-01-04]. （原始内容存档于2019-01-04）.
↑  . prlog.org. 2008-04-11  [2009-01-01]. （原始内容存档于2012-09-08）.
↑  Ana (meiadeleite). . Postcrossing. April 30, 2008  [January 24, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. April 11, 2008  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Magalhães, Paulo. . Postcrossing. February 26, 2009  [January 24, 2021]. （原始内容存档于2024-11-27）.
↑  . Postcrossing. February 26, 2009  [May 21, 2021]. （原始内容存档于2024-12-28）.
↑  Magalhães, Paulo. . Postcrossing. September 24, 2009  [January 24, 2021]. （原始内容存档于2017-11-08）.
↑  . Postcrossing. September 24, 2009  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. March 28, 2010  [January 24, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 28, 2010  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. August 24, 2010  [January 24, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 24, 2010  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 30, 2010  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Khasab. . Postcrossing Official Forum. April 19, 2011  [January 24, 2021]. （原始内容存档于May 2, 2011）.
↑  . Postcrossing. April 19, 2011  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 2, 2011  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. November 3, 2011  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. January 27, 2012  [January 24, 2021]. （原始内容存档于2014-08-24）.
↑  . Postcrossing. January 27, 2012  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. April 3, 2012  [May 21, 2021]. （原始内容存档于2023-06-30）.
↑  . Postcrossing. June 12, 2012  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 22, 2012  [May 21, 2021]. （原始内容存档于2017-11-08）.
↑  . Postcrossing. October 25, 2012  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. December 31, 2012  [January 24, 2021]. （原始内容存档于2021-05-19）.
↑  . Postcrossing. December 31, 2012  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 4, 2013  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. May 1, 2013  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. July 3, 2013  [May 21, 2021]. （原始内容存档于2023-06-30）.
↑  . Postcrossing. September 2, 2013  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. October 29, 2013  [January 24, 2021]. （原始内容存档于2017-11-07）.
↑  . Postcrossing. October 29, 2013  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 23, 2013  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. February 17, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Postcrossing Project [@postcrossing].  (推文). 10 April 2014 –Twitter.
↑  . Postcrossing. April 10, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Postcrossing Project [@postcrossing].  (推文). 10 June 2014 –Twitter.
↑  . Postcrossing. June 8, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. August 10, 2014  [January 24, 2021]. （原始内容存档于2016-04-23）.
↑  . Postcrossing. August 10, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Postcrossing Project [@postcrossing].  (推文). 10 October 2014 –Twitter.
↑  . Postcrossing. October 10, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 7, 2014  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. February 5, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. April 2, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. June 2, 2015  [January 24, 2021]. （原始内容存档于2017-10-08）.
↑  . Postcrossing. June 2, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 5, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. October 6, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 5, 2015  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. February 4, 2016  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 31, 2016  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. May 31, 2016  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 2, 2016  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. October 4, 2016  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 7, 2016  [May 21, 2021].
↑  Ana (meiadeleite). . Postcrossing. February 13, 2017  [January 24, 2021]. （原始内容存档于2017-10-08）.
↑  . Postcrossing. February 13, 2017  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. April 17, 2017  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. June 28, 2017  [May 21, 2021]. （原始内容存档于2023-06-30）.
↑  . Postcrossing. September 2, 2017  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. November 7, 2017  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. January 16, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 20, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. May 28, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 7, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. October 16, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. December 27, 2018  [January 24, 2021]. （原始内容存档于2019-01-04）.
↑  . Postcrossing. December 27, 2018  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 4, 2019  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. May 13, 2019  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. July 25, 2019  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. October 7, 2019  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. December 18, 2019  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. February 28, 2020  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. June 5, 2020  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 28, 2020  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. November 10, 2020  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  Ana (meiadeleite). . Postcrossing. January 24, 2021  [January 24, 2021]. （原始内容存档于2021-11-16）.
↑  . Postcrossing. January 25, 2021  [May 21, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. April 2, 2021  [April 2, 2021]. （原始内容存档于2024-12-27）.
↑  Postcrossing Project [@postcrossing].  (推文). June 8, 2021 –Twitter.
↑  Postcrossing Project [@postcrossing].  (推文). June 9, 2021 –Twitter.
↑  . Postcrossing. June 8, 2021  [June 8, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 18, 2021  [August 18, 2021]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. October 26, 2021  [January 5, 2023]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. January 4, 2022  [January 5, 2023]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. March 9, 2022  [January 5, 2023]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. May 25, 2022  [January 5, 2023]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. August 10, 2022  [January 5, 2023]. （原始内容存档于2023-01-05）.
↑  . Postcrossing. October 22, 2022  [January 5, 2023]. （原始内容存档于2024-12-27）.
↑  . Postcrossing. January 4, 2023  [January 5, 2023]. （原始内容存档于2023-01-05）.
1 2  （英文） .  Belposhta . 2014  [2014-07-19]. （原始内容存档于2014-05-30）.
↑  （英文） Ana Campos. . Postcrossing.com. 2012  [2014-07-19]. （原始内容存档于2013-01-31）.
↑  （中文） . 國立臺灣大學集郵筆友社. 2012  [2014-07-19]. （原始内容存档于2014-08-08）.
↑  （英文） Ana Campos. . Postcrossing.com. 2012  [2014-07-19]. （原始内容存档于2014-07-30）.
↑  （中文） . 清清集郵網. 2013  [2014-07-19]. （原始内容存档于2014-07-30）.
↑  （英文） Ana Campos. . Postcrossing.com. 2013  [2014-07-19]. （原始内容存档于2014-07-30）.
↑  （英文） . Itella Corporation. 2013  [2014-07-19]. （原始内容存档于2014-07-26）.
↑  （英文） Ana Campos. . Postcrossing.com. 2014  [2014-07-22]. （原始内容存档于2014-07-26）.
↑  （英文） . Guernsey Post. 2014  [2014-07-19]. （原始内容存档于2014-07-27）.
↑  （英文） Ana Campos. . Postcrossing.com. 2015  [2017-11-06]. （原始内容存档于2017-08-16）.
↑  （英文） meiadeleite. . Postcrossing.com. 2015  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （英文） meiadeleite. . Postcrossing.com. 2015  [2017-11-08]. （原始内容存档于2017-11-08）.
↑   乌克兰 ukrposhta. . ukrposhta.ua. 2015  [2017-11-09]. （原始内容存档于2017-10-31）.
↑  （英文） meiadeleite. . postnl.nl. 2016  [2017-11-08]. （原始内容存档于2017-11-08）.
↑   （英文） Austrian Post. . post.at. 2016  [2017-11-09].
↑  （英文） . SchwesterSusi. 2016  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （波兰語） Poczta Polska. . poczta-polska.pl. 2016  [2017-11-09]. （原始内容存档于2017-11-09）.
↑  （英文） Guernsey Stamps and Collectables. . guernseystamps.com. 2016  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （英文） belpost. . belpost.by. 2017  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （英文） Swiss Post Media Unit. . post.ch. 2017  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （英文） irishstamps. . irishstamps.ie. 2017  [2017-11-08]. （原始内容存档于2017-11-08）.
↑  （日語） . 日本郵政株式會社. 2014  [2014-07-22]. （原始内容存档于2014-07-28）.
↑  （英文） . Postcrossing.com.   [2014-07-23]. （原始内容存档于2014-07-03）.