Gaya APA

Medley, D, B., Eaves, R, W. (1984). Programing Principles With Cobol I (Ed. 1). Cincinati: South-Western Publishing.

Gaya MLA

Medley, Don, B.., Eaves, Ronald, W.. "Programing Principles With Cobol I". Ed. 1 Cincinati: South-Western Publishing, 1984. Text.