Citazione Stile APA (7a Edizione)

Heinritz, S. F. (1991). Purchasing: Principles and applications (8th ed.). Prentice Hall.

Citazione stile Chigago Style (17a edizione)

Heinritz, Stuart F. Purchasing: Principles and Applications. 8th ed. Englewood Cliffs, N.J: Prentice Hall, 1991.

Citatione MLA (9a ed.)

Heinritz, Stuart F. Purchasing: Principles and Applications. 8th ed. Prentice Hall, 1991.