Smith, Marilyn Z.
Standard Cobol: a problem-solving approach
Houghton-Mifflin, 1974
Buku Teks
Drummond, Marshall E.
American national standard Cobol for the IBM system 360-370
Wadsworth, 1973
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Seidel, Kenneth P.
Cobol
Goodyear , 1971
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Cohn, Laurence S.
Effective use of ANS COBOL computer programming language
Wiley-Interscience, 1975
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Armstrong, Russell M.
Modular programming in cobol
John Wiley & Sons, 1973
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