Cita APA (7a ed.)

Ritchie, C. (1995). Operating systems: Incorporating UNIX and MS-DOS (Second edition.). BPB Publications.

Cita Chicago Style (17a ed.)

Ritchie, C. Operating Systems: Incorporating UNIX and MS-DOS. Second edition. New Delhi: BPB Publications, 1995.

Cita MLA (8a ed.)

Ritchie, C. Operating Systems: Incorporating UNIX and MS-DOS. Second edition. BPB Publications, 1995.