Gaya APA
Structured COBOL A Step By Step Approach. (1987).
New York:
McGraw-Hiil.
Gaya Chicago
Structured COBOL A Step By Step Approach.
.
New York:
McGraw-Hiil,
1987.
.
Gaya MLA
Structured COBOL A Step By Step Approach.
.
New York:
McGraw-Hiil,
1987.
.
Gaya Turabian
Structured COBOL A Step By Step Approach.
New York:
McGraw-Hiil,
1987.
.