APA

Westing J. H., Fine I. V. & Zenz G. J. (1969). Purchasing management: materials in motion. New York: Wiley.

Chicago

Westing J Howard, Fine Isadore Victor and Zenz Gary Joseph. 1969. Purchasing management: materials in motion. New York: Wiley.

Harvard

Westing J. H., Fine I. V. and Zenz G. J. (1969). Purchasing management: materials in motion. New York: Wiley.

MLA

Westing J Howard, Fine Isadore Victor and Zenz Gary Joseph. Purchasing management: materials in motion. New York: Wiley. 1969.