APA引文

Schroeder, R. C. (1989). An outline of American Government. USA: USIA.

Trích dẫn kiểu Chicago

Schroeder, Richard C. An Outline of American Government. USA: USIA, 1989.

MLA引文

Schroeder, Richard C. An Outline of American Government. USA: USIA, 1989.

警告：这些引文格式不一定是100％准确.