Gaya APA
DOBLER, D, W., Lee, L. (1990).
PURCHASING AND MATERIALS MANAGEMENT : TEXT AND CASES (Ed ke-5).
Amerika:
McGrawe-Hill.
Gaya MLA
DOBLER, Donald, W., Lee, Lamar.
"PURCHASING AND MATERIALS MANAGEMENT : TEXT AND CASES".
Ed ke-5
Amerika:
McGrawe-Hill,
1990.
Text.