APA引文

Ruffin, R., & Gregory, P. R. (1993). Principles of microeconomics (5th ed.). HarperCollins College Publishers.

芝加哥风格引文

Ruffin, Roy, 与 Paul R. Gregory. Principles of Microeconomics. 5th ed. New York, NY: HarperCollins College Publishers, 1993.

MLA引文

Ruffin, Roy, 与 Paul R. Gregory. Principles of Microeconomics. 5th ed. HarperCollins College Publishers, 1993.

警告：这些引文格式不一定是100％准确.