APA (7th ed.) Citation

Asher, R. E., & Simpson, J. M. Y. (1994). The Encyclopedia of language and linguistics. Pergamon Press.

Chicago Style (17th ed.) Citation

Asher, R. E., and J. M. Y. Simpson. The Encyclopedia of Language and Linguistics. Oxford ; New York: Pergamon Press, 1994.

MLA (9th ed.) Citation

Asher, R. E., and J. M. Y. Simpson. The Encyclopedia of Language and Linguistics. Pergamon Press, 1994.