APA Alıntı

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

Chicago Stili Alıntı

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

MLA Alıntı

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