APA引文

Frank, R. H. (2001). Principles of economics. McGraw-Hill/Irwin.

Trích dẫn kiểu Chicago

Frank, Robert H. Principles of Economics. McGraw-Hill/Irwin, 2001.

MLA引文

Frank, Robert H. Principles of Economics. McGraw-Hill/Irwin, 2001.

警告：這些引文格式不一定是100％准確.