Heinritz, S. F. (1997). Purchasing: Principles and applications (8th international ed.). Jemma.
Chicago Style (17th ed.) CitationHeinritz, Stuart F. Purchasing: Principles and Applications. 8th international ed. Cainta, Rizal: Jemma, 1997.
MLA (9th ed.) CitationHeinritz, Stuart F. Purchasing: Principles and Applications. 8th international ed. Jemma, 1997.
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