Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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