Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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