APA (7e ed.) Bronvermelding

Leenders, M. R., & Fearon, H. E. (1993). Purchasing and materials management (10th ed.). Irwin.

Chicago (17e ed.) Bronvermelding

Leenders, Michiel R., en Harold E. Fearon. Purchasing and Materials Management. 10th ed. Homewood, IL: Irwin, 1993.

MLA (9e ed.) Bronvermelding

Leenders, Michiel R., en Harold E. Fearon. Purchasing and Materials Management. 10th ed. Irwin, 1993.