APA استشهاد

Leenders, M. R. (2002). Purchasing and supply management (12th ed.). McGraw Hill.

استشهاد بنمط شيكاغو

Leenders, Michiel R. Purchasing and Supply Management. 12th ed. New York: McGraw Hill, 2002.

MLA استشهاد

Leenders, Michiel R. Purchasing and Supply Management. 12th ed. McGraw Hill, 2002.