Gaya APA
Jr., S, T., Douglas, K, D.
(1986).
ANSI STRUCTURED COBOL An Introduction
.
Homewood,Illinois:
IRWIN.
Gaya MLA
Jr., Steve, Teglovic,., Douglas, Kenneth, D..
"ANSI STRUCTURED COBOL An Introduction".
Homewood,Illinois:
IRWIN,
1986.
Textbook.