APA استشهاد

Leenders, M. R. a. (1985). Purchasing and materials management. Universal book.

استشهاد بنمط شيكاغو

Leenders, Michiel R...[et al.]. Purchasing and Materials Management. New Delhi: Universal book, 1985.

MLA استشهاد

Leenders, Michiel R...[et al.]. Purchasing and Materials Management. Universal book, 1985.