Held, G. (1987). IBM PC & PC XT: Users reference mannual. BPB.
Chicago Edition CitationHeld, Gilbert. IBM PC & PC XT: Users Reference Mannual. New Delhi: BPB, 1987.
MLA Edition CitationHeld, Gilbert. IBM PC & PC XT: Users Reference Mannual. BPB, 1987.
Warning: These citations may not always be 100% accurate.