Ritchie, C. (1995). Operating systems: Incorporating UNIX and MS-DOS (Second edition.). BPB Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRitchie, C. Operating Systems: Incorporating UNIX and MS-DOS. Second edition. New Delhi: BPB Publications, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRitchie, C. Operating Systems: Incorporating UNIX and MS-DOS. Second edition. BPB Publications, 1995.
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