Language change

MLA

Aitchison, Jean. Language Change : Progress Or Decay?. 4th ed. Cambridge: Cambridge University Press, 2013.

APA

Aitchison, J. (2013). Language change : progress or decay?. 4th ed. Cambridge: Cambridge University Press.

Chicago

Aitchison, Jean, Language Change: Progress Or Decay?. 4th ed. Cambridge: Cambridge University Press, 2013.