Παραπομπή APA
Thompson, W. M. (1968). The Basics of successful salesmanship: A self-teaching programedbook. New York: McGraw Hill.
Παραπομπή Chicago StyleThompson, Willard M. The Basics of Successful Salesmanship: A Self-teaching Programedbook. New York: McGraw Hill, 1968.
Παραπομπή MLAThompson, Willard M. The Basics of Successful Salesmanship: A Self-teaching Programedbook. New York: McGraw Hill, 1968.
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