APA (7th ed.) Citation

Trask, R. L. (2004). Key concepts in language and linguistics. Routledge.

Chicago Style (17th ed.) Citation

Trask, R. L. Key Concepts in Language and Linguistics. London: Routledge, 2004.

MLA (9th ed.) Citation

Trask, R. L. Key Concepts in Language and Linguistics. Routledge, 2004.