Cita APA (7a ed.)

Ritchie, C. Operating Systems: Incorporating Unix and Windows (2nd.).

Cita Chicago Style (17a ed.)

Ritchie, Colin. Operating Systems: Incorporating Unix and Windows. 2nd. NewDelhi: BPB Publications, 2006.

Cita MLA (9a ed.)

Ritchie, Colin. Operating Systems: Incorporating Unix and Windows. 2nd.