(1997). Teach yourself Cobol in 21 days / Mo Budlong.
Cita Chicago (17th ed.)Teach Yourself Cobol in 21 Days / Mo Budlong. 1997.
Cita MLA (9th ed.)Teach Yourself Cobol in 21 Days / Mo Budlong. 1997.
Atenció: Aquestes cites poden no estar 100% correctes.