APA (7th ed.) Citation

Beardon, C., Lumsden, D., & Holmes, G. (1991). Natural language and computational linguistics: An introduction (1. publ.). Horwood.

Chicago Style (17th ed.) Citation

Beardon, Colin, David Lumsden, and Geoffrey Holmes. Natural Language and Computational Linguistics: An Introduction. 1. publ. New York u.a: Horwood, 1991.

MLA (9th ed.) Citation

Beardon, Colin, et al. Natural Language and Computational Linguistics: An Introduction. 1. publ. Horwood, 1991.