APA引文

Arnold, R. A. (1999). Economics in our times. Chicago, Ill: National Textbook Company.

Trích dẫn kiểu Chicago

Arnold, Roger A. Economics in Our Times. Chicago, Ill: National Textbook Company, 1999.

MLA引文

Arnold, Roger A. Economics in Our Times. Chicago, Ill: National Textbook Company, 1999.

警告：這些引文格式不一定是100％准確.