Cita APA (7a ed.)

WORTH THOMAS. (1984). COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC.

Cita Chicago Style (17a ed.)

WORTH THOMAS. COBOL FOR BEGINNERS. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1984.

Cita MLA (9a ed.)

WORTH THOMAS. COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC, 1984.