WeberSystems Incorporati. IBM PC & XT user`s handbook. BPB.
Cita Chicago (17th ed.)WeberSystems Incorporati. IBM PC & XT User`s Handbook. New Delhi: BPB.
Cita MLA (9th ed.)WeberSystems Incorporati. IBM PC & XT User`s Handbook. BPB.
Atenció: Aquestes cites poden no estar 100% correctes.