Cita APA (7th ed.)

Held, G. (1987). IBM PC & PC XT: User`s Ref. Manual (2nd.). BPB.

Cita Chicago (17th ed.)

Held, Gilbert. IBM PC & PC XT: User`s Ref. Manual. 2nd. New Delhi: BPB, 1987.

Cita MLA (9th ed.)

Held, Gilbert. IBM PC & PC XT: User`s Ref. Manual. 2nd. BPB, 1987.