WeberSystems Incorporati. IBM PC & XT user`s handbook. BPB.
Chicago Style aipamenaWeberSystems Incorporati. IBM PC & XT User`s Handbook. New Delhi: BPB.
MLA aipamenaWeberSystems Incorporati. IBM PC & XT User`s Handbook. BPB.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.