Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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