APA (7 वां संस्करण) प्रशस्ति पत्र

Allen, J. (1995). Natural language understanding (2nd ed.). Benjamin/Cummings Pub. Co. ; Pearson Education.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Allen, James. Natural Language Understanding. 2nd ed. Redwood City, Calif. : New Delhi: Benjamin/Cummings Pub. Co. ; Pearson Education, 1995.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Allen, James. Natural Language Understanding. 2nd ed. Benjamin/Cummings Pub. Co. ; Pearson Education, 1995.