APA (7e ed.) Bronvermelding

Litecky, C. R., & Davis, G. B. (1987). Structured COBOL: A step by step approach. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Litecky, Charles R., en Gordon Bitter Davis. Structured COBOL: A Step by Step Approach. New York: McGraw-Hill, 1987.

MLA (9e ed.) Bronvermelding

Litecky, Charles R., en Gordon Bitter Davis. Structured COBOL: A Step by Step Approach. McGraw-Hill, 1987.