WORTH THOMAS. (1984). COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC.
芝加哥风格引文WORTH THOMAS. COBOL FOR BEGINNERS. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1984.
MLA引文WORTH THOMAS. COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC, 1984.
警告：这些引文格式不一定是100％准确.