Cita APA (7th ed.)

Campbell, L., & Poser, W. J. (2008). Language classification: History and method. Cambridge University Press.

Cita Chicago (17th ed.)

Campbell, Lyle, i William John Poser. Language Classification: History and Method. Cambridge, UK ; New York: Cambridge University Press, 2008.

Cita MLA (9th ed.)

Campbell, Lyle, i William John Poser. Language Classification: History and Method. Cambridge University Press, 2008.