APA (7th ed.) Citation

Zenz, G. J., & Westing, J. H. (1981). Purchasing and the management of materials (5th ed.). Wiley.

Chicago Style (17th ed.) Citation

Zenz, Gary Joseph, and J. Howard Westing. Purchasing and the Management of Materials. 5th ed. New York: Wiley, 1981.

MLA (9th ed.) Citation

Zenz, Gary Joseph, and J. Howard Westing. Purchasing and the Management of Materials. 5th ed. Wiley, 1981.