HELD GILBERT. (1987). IBM PC AND PC XT USER`S REFERENCE MANUAL (2.). BPB PUBLICATIONS.
Chicagoスタイル(17版)引用形式HELD GILBERT. IBM PC AND PC XT USER`S REFERENCE MANUAL. 2. DELHI: BPB PUBLICATIONS, 1987.
MLA(9版)引用形式HELD GILBERT. IBM PC AND PC XT USER`S REFERENCE MANUAL. 2. BPB PUBLICATIONS, 1987.
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