WORTH THOMAS. (1984). COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC.
Chicagoスタイル(17版)引用形式WORTH THOMAS. COBOL FOR BEGINNERS. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1984.
MLA(9版)引用形式WORTH THOMAS. COBOL FOR BEGINNERS. PRENTICE -HALL INTERNATIONAL, INC, 1984.
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