Cita APA (7th ed.)

Philippakis, A. S., & Kazmier, L. J. (1981). Structured COBOL (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Philippakis, Andreas S., i Leonard J. Kazmier. Structured COBOL. 2nd ed. New York: McGraw-Hill, 1981.

Cita MLA (9th ed.)

Philippakis, Andreas S., i Leonard J. Kazmier. Structured COBOL. 2nd ed. McGraw-Hill, 1981.