LITECKY, C. R. (1987). Structured cobola step by step approach. McGraw Hill.
Čikaški stil citiranja (17. izdanje)LITECKY, Charles R. Structured Cobola Step by Step Approach. McGraw Hill, 1987.
MLA način citiranja (8. izdanje)LITECKY, Charles R. Structured Cobola Step by Step Approach. McGraw Hill, 1987.
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