APA (7th ed.) Citation

Lightfoot, D. (2006). How new languages emerge. Cambridge University Press.

Chicago Style (17th ed.) Citation

Lightfoot, David. How New Languages Emerge. Cambridge, [England]: Cambridge University Press, 2006.

MLA (9th ed.) Citation

Lightfoot, David. How New Languages Emerge. Cambridge University Press, 2006.

Warning: These citations may not always be 100% accurate.