MCGRACKEN DANIEL D. (1976). SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. JOHN WILEY AND SONS.
Chicago-viite (17. p.)MCGRACKEN DANIEL D. SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. NEW YORK: JOHN WILEY AND SONS, 1976.
MLA-viite (9. p.)MCGRACKEN DANIEL D. SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. JOHN WILEY AND SONS, 1976.
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