Held, G. (1987). IBM PC & PC XT: User`s Ref. Manual (2nd.). BPB.
Chicago Style (17th ed.) CitationHeld, Gilbert. IBM PC & PC XT: User`s Ref. Manual. 2nd. New Delhi: BPB, 1987.
MLA (9th ed.) CitationHeld, Gilbert. IBM PC & PC XT: User`s Ref. Manual. 2nd. BPB, 1987.
Warning: These citations may not always be 100% accurate.