Nickerson, Robert C.
Fundamentals of structured COBOL
Little, Brown, 1984
Buku Teks
Graver, Robert T.
Structured methods trough COBOL
Prentice-Hall, 1983
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Johnson, David L., 1935-
Writing Structured COBOL
Addison-Wesley, 1986
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Stern, Nancy B.
Structured COBOL programming
Wiley, 1994
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Brown, Gary D.
Advanced ANS cobol: with structured programming
John Wiley & Sons, 1977
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