APA

Zenz G. J., Thompson G. H., . (1994). Purchasing and the management of materials. New York: Wiley.

Chicago

Zenz Gary Joseph, Thompson George H, . 1994. Purchasing and the management of materials. New York: Wiley.

Harvard

Zenz G. J., Thompson G. H., . (1994). Purchasing and the management of materials. New York: Wiley.

MLA

Zenz Gary Joseph, Thompson George H, . Purchasing and the management of materials. New York: Wiley. 1994.