APA引文

Gettell, R. G. (1933). Political science. Boston: Ginn and company.

Trích dẫn kiểu Chicago

Gettell, Raymond Garfield. Political Science. Boston: Ginn and company, 1933.

MLA引文

Gettell, Raymond Garfield. Political Science. Boston: Ginn and company, 1933.

警告：這些引文格式不一定是100％准確.