Bernard, D. (1977). Charging For Computer Services: Principles and Guidelines. Petrocell.
シカゴスタイル引用形Bernard, Dan. Charging For Computer Services: Principles and Guidelines. New York: Petrocell, 1977.
MLA引用形式Bernard, Dan. Charging For Computer Services: Principles and Guidelines. Petrocell, 1977.
警告: この引用は必ずしも正確ではありません.