APA引文

Gregory, P. R. (2005). Essentials of economics. Boston, MA: Pearson Education.

Trích dẫn kiểu Chicago

Gregory, Paul R. Essentials of Economics. Boston, MA: Pearson Education, 2005.

MLA引文

Gregory, Paul R. Essentials of Economics. Boston, MA: Pearson Education, 2005.

警告：这些引文格式不一定是100％准确.