APA Citatie

Bernard, D. (1977). Charging For Computer Services: Principles and Guidelines. Petrocell.

Chicago Style citaat

Bernard, Dan. Charging For Computer Services: Principles and Guidelines. New York: Petrocell, 1977.

MLA citatie

Bernard, Dan. Charging For Computer Services: Principles and Guidelines. Petrocell, 1977.

Let op: Deze citaties zijn niet altijd 100% accuraat.