Cita APA (7th ed.)

Walstrom, J. A. J. (1985). Advanced structured cobol. Macmillan.

Cita Chicago (17th ed.)

Walstrom, John A. J. Advanced Structured Cobol. New York: Macmillan, 1985.

Cita MLA (9th ed.)

Walstrom, John A. J. Advanced Structured Cobol. Macmillan, 1985.