APA引文

Frank, R. H. (2010). Principles of economics. 2nd ed: McGraw-Hill Education.

Trích dẫn kiểu Chicago

Frank, Robert H. Principles of Economics. 2nd ed: McGraw-Hill Education, 2010.

MLA引文

Frank, Robert H. Principles of Economics. 2nd ed: McGraw-Hill Education, 2010.

警告：这些引文格式不一定是100％准确.