"4th Network Hotels Get Wired with Hotmail E-mail Service and High Speed Internet Access; Hotmail and 4th Network Ink Agreement to Keep Business Travelers Connected".
Truy cập ngày 26 tháng 10 năm 2010.  ^ “4th Network Hotels Get Wired with Hotmail E-mail Service and High Speed Internet Access; Hotmail and 4th Network Ink Agreement to Keep Business Travelers Connected.”.