Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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