APA Edition Citation

Froyen, R. T., & Greer, D. F. (1990). Principles of economics. Macmillan.

Chicago Edition Citation

Froyen, Richard T., and Douglas F. Greer. Principles of Economics. New York: Macmillan, 1990.

MLA Edition Citation

Froyen, Richard T., and Douglas F. Greer. Principles of Economics. Macmillan, 1990.

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