एपीए उद्धरण

Worth, T. e. (1982). COBOL for beginners. Prentice Hall.

शिकागो स्टाइल उद्धरण

Worth, T. ed. COBOL for Beginners. New Delhi: Prentice Hall, 1982.

एमएलए उद्धरण

Worth, T. ed. COBOL for Beginners. Prentice Hall, 1982.