Cita APA (7th ed.)

Philippakis, A. S. (1978). Information systems through Cobol (2nded.). McGraw-Hill.

Cita Chicago (17th ed.)

Philippakis, Andreas S. Information Systems Through Cobol. 2nded. New York: McGraw-Hill, 1978.

Cita MLA (9th ed.)

Philippakis, Andreas S. Information Systems Through Cobol. 2nded. McGraw-Hill, 1978.