APA (7th ed.) Citation

Aitchison, J. (2001). Language change: Progress or decay? (3rd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? 3rd ed. Cambridge [England] ; New York: Cambridge University Press, 2001.

MLA (8th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? 3rd ed. Cambridge University Press, 2001.