APA (7th ed.) Citation

Gregory, P. R., & Ruffin, R. (1989). Basic microeconomics. Scott, Foresman.

Chicago Style (17th ed.) Citation

Gregory, Paul R., and Roy Ruffin. Basic Microeconomics. Glenview, Ill: Scott, Foresman, 1989.

MLA (9th ed.) Citation

Gregory, Paul R., and Roy Ruffin. Basic Microeconomics. Scott, Foresman, 1989.