APA (7e ed.) Bronvermelding
Heinritz, S. F., Farrell, P. V., & Smith, C. L. (1986). Purchasing: Principles and applications (7th ed.). Prentice-Hall.
Chicago (17e ed.) Bronvermelding
Heinritz, Stuart F., Paul V. Farrell, en Clifton L. Smith. Purchasing: Principles and Applications. 7th ed. Englwood Cliffs, N.J.: Prentice-Hall, 1986.
MLA (9e ed.) Bronvermelding
Heinritz, Stuart F., et al. Purchasing: Principles and Applications. 7th ed. Prentice-Hall, 1986.
Let op: Deze citaties zijn niet altijd 100% accuraat.