APA استشهاد

England, W. B., & Leenders, M. R. (1975). Purchasing and materials management (6th ed.). Richard D. Irwin.

استشهاد بنمط شيكاغو

England, Wilbur B., و Michiel R. Leenders. Purchasing and Materials Management. 6th ed. Homewood, III: Richard D. Irwin, 1975.

MLA استشهاد

England, Wilbur B., و Michiel R. Leenders. Purchasing and Materials Management. 6th ed. Richard D. Irwin, 1975.