APA (7th ed.) Citation

Trask, R. L., Maybelin,Bill, & Appignanesi, R. (2005). Introducing linguistics. Icon Books.

Chicago Style (17th ed.) Citation

Trask, R. L., Maybelin,Bill, and Richard Appignanesi. Introducing Linguistics. Thriplow, Royston, [England]: Icon Books, 2005.

MLA (9th ed.) Citation

Trask, R. L., et al. Introducing Linguistics. Icon Books, 2005.