Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Allen, James. Natural Language Understanding. 2nd ed. Redwood City, Calif: Benjamin/Cummings Pub, 1995.

Cita MLA (9th ed.)

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