NAPS THOMAS L. (1982). COBOL: A COMPREHENSIVE TREATMENT. RESTON PUBLISHERS.
Cita Chicago (17th ed.)NAPS THOMAS L. COBOL: A COMPREHENSIVE TREATMENT. VIRGINIA: RESTON PUBLISHERS, 1982.
Cita MLA (9th ed.)NAPS THOMAS L. COBOL: A COMPREHENSIVE TREATMENT. RESTON PUBLISHERS, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.