Cita APA (7th ed.)

(1977). Advanced ANS COBOL with structured programming / Gary D. Brown.

Cita Chicago (17th ed.)

Advanced ANS COBOL with Structured Programming / Gary D. Brown. 1977.

Cita MLA (9th ed.)

Advanced ANS COBOL with Structured Programming / Gary D. Brown. 1977.

Atenció: Aquestes cites poden no estar 100% correctes.