Παραπομπή APA

Ritchie, C. (2003). Operating systems.-3rd ed (3rd ed.). BPB.

Παραπομπή Chicago Style

Ritchie, Collin. Operating Systems.-3rd Ed. 3rd ed. New Delhi: BPB, 2003.

Παραπομπή MLA

Ritchie, Collin. Operating Systems.-3rd Ed. 3rd ed. BPB, 2003.