APA (7th ed.) Zitazioa

Litecky, C. R. (1987). Structured cobol: A step by step approach. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Litecky, Charles R. Structured Cobol: A Step by Step Approach. New York: McGraw-Hill, 1987.

MLA (9th ed.) Zitazioa

Litecky, Charles R. Structured Cobol: A Step by Step Approach. McGraw-Hill, 1987.