郵政式
China postal album: showing the postal establishments and postal routes in each province. 2d ed. Peking: Directorate General of Posts, 1919.
Playfair, G. M. H. The Cities and Towns of China: A Geographical Dictionary. 2d. ed. Shanghai: Kelly & Walsh Ltd., 1910.
"邮政式拼音" 中国大百科全书:语言文字。 北京: 中国大百科全书出版社, 1998.