Cita APA (7th ed.)

Phillippakis, A. (1986). Structural cobol (3rd.). Mc Graw Hill.

Cita Chicago (17th ed.)

Phillippakis, A. Structural Cobol. 3rd. New York: Mc Graw Hill, 1986.

Cita MLA (9th ed.)

Phillippakis, A. Structural Cobol. 3rd. Mc Graw Hill, 1986.