Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.