APA Style

Trask, R. L.. (1999). Key Concepts in Languange and Linguistics . London: Routledge, Taylor and Francis Group.

Chicago Style

Trask, R. L.. Key Concepts in Languange and Linguistics. London: Routledge, Taylor and Francis Group, 1999. Text.

MLA Style

Trask, R. L.. Key Concepts in Languange and Linguistics. London: Routledge, Taylor and Francis Group, 1999. Text.

Turabian Style

Trask, R. L.. Key Concepts in Languange and Linguistics. London: Routledge, Taylor and Francis Group, 1999. Print.