APA استشهاد

Crissy, W. J., & Cunningham, I. C. M. (1977). Effective selling: A short course for professionals. Wiley.

استشهاد بنمط شيكاغو

Crissy, William Joseph, و Isabella C. M. Cunningham. Effective Selling: A Short Course for Professionals. New York: Wiley, 1977.

MLA استشهاد

Crissy, William Joseph, و Isabella C. M. Cunningham. Effective Selling: A Short Course for Professionals. Wiley, 1977.