Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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