APA引文

Samuelson, P. A., & Nordhaus, W. D. (1998). Economics (16th ed.). Boston, Mass: Irwin/McGraw-Hill.

Trích dẫn kiểu Chicago

Samuelson, Paul A., và William D. Nordhaus. Economics. 16th ed. Boston, Mass: Irwin/McGraw-Hill, 1998.

MLA引文

Samuelson, Paul A., và William D. Nordhaus. Economics. 16th ed. Boston, Mass: Irwin/McGraw-Hill, 1998.

警告：這些引文格式不一定是100％准確.