APA (7th ed.) Citation

Aitchison, J. (1985). Language change: Progress or decay? Universe Books.

Chicago Style (17th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? New York: Universe Books, 1985.

MLA (9th ed.) Citation

Aitchison, Jean. Language Change: Progress or Decay? Universe Books, 1985.