APA Zitierstil

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

Chicago Zitierstil

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

MLA Zitierstil

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

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.