APA (7th ed.) Citation

Allen, J. (1995). Natural language understanding (2. ed.). Benjamin/Cummings.

Chicago Style (17th ed.) Citation

Allen, James. Natural Language Understanding. 2. ed. Redwood City, Calif. [u.a.]: Benjamin/Cummings, 1995.

MLA (9th ed.) Citation

Allen, James. Natural Language Understanding. 2. ed. Benjamin/Cummings, 1995.