APA aipamena

ROY M.K. (1991). COBOL PROGRAMMING. TATA MC GRAW HILL.

Chicago Style aipamena

ROY M.K. COBOL PROGRAMMING. TATA MC GRAW HILL, 1991.

MLA aipamena

ROY M.K. COBOL PROGRAMMING. TATA MC GRAW HILL, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.