Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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