APA (7e ed.) Bronvermelding

Colberg, M. R., Alt, R. M., Forbush, D. R., & Whitaker, G. R. (1975). Business economics: Principles and cases (5th ed.). R. D. Irwin.

Chicago (17e ed.) Bronvermelding

Colberg, Marshall Rudolph, Richard M. Alt, Dascomb Ramsey Forbush, en Gilbert R. Whitaker. Business Economics: Principles and Cases. 5th ed. Homewood, Ill.: R. D. Irwin, 1975.

MLA (8e ed.) Bronvermelding

Colberg, Marshall Rudolph, et al. Business Economics: Principles and Cases. 5th ed. R. D. Irwin, 1975.