Παραπομπή APA
Russell, F. A., Beach, F. H., & Buskirk, R. H. (1978). Textbook of salesmanship (10th ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleRussell, Frederic Arthur, Frank Herman Beach, and Richard Hobart Buskirk. Textbook of Salesmanship. 10th ed. New York: McGraw-Hill, 1978.
Παραπομπή MLARussell, Frederic Arthur, Frank Herman Beach, and Richard Hobart Buskirk. Textbook of Salesmanship. 10th ed. New York: McGraw-Hill, 1978.
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