Litecky, C. R. (1987). Structured cobol: A step by step approach. McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Litecky, Charles R. Structured Cobol: A Step by Step Approach. New York: McGraw-Hill, 1987.
Citatione MLA (9a ed.)Litecky, Charles R. Structured Cobol: A Step by Step Approach. McGraw-Hill, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.