APA (7th ed.) Zitazioa

BONNO, J. A. (1982). Introduction to COBOL. Business Publications.

Chicago Style (17th ed.) Zitazioa

BONNO, John A. Introduction to COBOL. Plano, Tex.: Business Publications, 1982.

MLA (9th ed.) Zitazioa

BONNO, John A. Introduction to COBOL. Business Publications, 1982.