APA (7th ed.) Citation

Radford, A. (2009). Linguistics: An introduction (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Radford, Andrew. Linguistics: An Introduction. 2nd ed. Cambridge, [England]: Cambridge University Press, 2009.

MLA (9th ed.) Citation

Radford, Andrew. Linguistics: An Introduction. 2nd ed. Cambridge University Press, 2009.