Gaya APA
Medley, Don B.. (1984).
Programming Principles with COBOL 1 .
South-Western:
Cicinanti.
Gaya Chicago
Medley, Don B..
Programming Principles with COBOL 1.
South-Western:
Cicinanti,
1984.
Text.
Gaya MLA
Medley, Don B..
Programming Principles with COBOL 1.
South-Western:
Cicinanti,
1984.
Text.
Gaya Turabian
Medley, Don B..
Programming Principles with COBOL 1.
South-Western:
Cicinanti,
1984.
Print.