APA (7th ed.) Citation

Aitchison, J. (1998). Language change: Progress or decay? (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? 2nd ed. Cambridge, United Kingdom: Cambridge University Press, 1998.

MLA (9th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? 2nd ed. Cambridge University Press, 1998.