APA引文

Birdsall, S. S. (1998). Outline American Geography. USA: United states Infomation Agency.

Trích dẫn kiểu Chicago

Birdsall, Stephen S. Outline American Geography. USA: United states Infomation Agency, 1998.

MLA引文

Birdsall, Stephen S. Outline American Geography. USA: United states Infomation Agency, 1998.

警告：這些引文格式不一定是100％准確.