APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Asher, R. E., and J. M. Y. Simpson. The Encyclopedia of Language and Linguistics. Oxford [etc.]: Pergamon, 1994.

MLA (9th ed.) Citation

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