APA (7th ed.) Citation

Ruffin, R., & Gregory, P. R. (1983). Principles of economics. Scott, Foresman and Company.

Chicago Style (17th ed.) Citation

Ruffin, Roy, and Paul R. Gregory. Principles of Economics. Glenview, Illinois: Scott, Foresman and Company, 1983.

MLA (9th ed.) Citation

Ruffin, Roy, and Paul R. Gregory. Principles of Economics. Scott, Foresman and Company, 1983.

Warning: These citations may not always be 100% accurate.