APA引文

Guell, R. C., & 1906-1998. (2011). Issues in economics today (6th ed.). Dubuque: McGraw-Hill.

Trích dẫn kiểu Chicago

Guell, Robert C., và 1906-1998. Issues in Economics Today. 6th ed. Dubuque: McGraw-Hill, 2011.

MLA引文

Guell, Robert C., và 1906-1998. Issues in Economics Today. 6th ed. Dubuque: McGraw-Hill, 2011.

警告：这些引文格式不一定是100％准确.