Robinson, O. P. (1950). Successful retail salesmanship (2nd ed.). Prentice-Hall.
Chicago Style (17. basım) AtıfRobinson, O. Preston. Successful Retail Salesmanship. 2nd ed. New York: Prentice-Hall, 1950.
MLA (9th ed.) AtıfRobinson, O. Preston. Successful Retail Salesmanship. 2nd ed. Prentice-Hall, 1950.
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