Manning, G. L., & Reece, B. L. (1990). Selling today : a personal approach : an extension of the marketing concept / Gerald L. Manning, Barry L. Reece.: A personal approach : an extension of the marketing concept (4th ed.). Allyn and Bacon.
Chicago Style (17th ed.) CitationManning, Gerald L., and Barry L. Reece. Selling Today : A Personal Approach : An Extension of the Marketing Concept / Gerald L. Manning, Barry L. Reece.: A Personal Approach : An Extension of the Marketing Concept. 4th ed. Boston: Allyn and Bacon, 1990.
MLA (9th ed.) CitationManning, Gerald L., and Barry L. Reece. Selling Today : A Personal Approach : An Extension of the Marketing Concept / Gerald L. Manning, Barry L. Reece.: A Personal Approach : An Extension of the Marketing Concept. 4th ed. Allyn and Bacon, 1990.