Gaya APA

Philippakis, A, S., Kazmier, L, J. (1978). Information systems through cobol. (1978). : New York : McGraw-Hill,.

Gaya MLA

Philippakis, Andreas, S.., Kazmier, Leonard, J.. "Information systems through cobol.". 1978 : New York : McGraw-Hill,, 1978. Text.