Stern, Nancy B.
Cobol programming
John Wiley & Sons, 1970
Buku Teks
Maynard, Jeff
Modular programming
Butterworth, 1972
Buku Teks SO
Stern, Nancy B.
Structured COBOL programming
Wiley, 1994
Buku Teks SO
Brown, Gary D.
Advanced ANS cobol: with structured programming
John Wiley & Sons, 1977
Buku Teks SO
McCraken, Daniel D.
A Simplified guide to structured cobol programming
John Wiley & Sons, 1976
Buku Teks SO