Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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