APA استشهاد

Colberg, M. R., & Forbush, D. R. (1975). Business economics: Principles and cases (5th.). Richard.

استشهاد بنمط شيكاغو

Colberg, Marshall R., و Dascomb R. Forbush. Business Economics: Principles and Cases. 5th. Illinois: Richard, 1975.

MLA استشهاد

Colberg, Marshall R., و Dascomb R. Forbush. Business Economics: Principles and Cases. 5th. Richard, 1975.