Stern, Nancy B.
Structured COBOL programming
Wiley, 1994
Buku Teks
Armstrong, Russell M.
Modular programming in cobol
John Wiley & Sons, 1973
Buku Teks
Brown, Gary D.
Advanced ANS cobol: with structured programming
John Wiley & Sons, 1977
Buku Teks
McCraken, Daniel D.
A Simplified guide to structured cobol programming
John Wiley & Sons, 1976
Buku Teks
Cohn, Laurence S.
Effective use of ANS COBOL computer programming language
Wiley-Interscience, 1975
Buku Teks