Yule, G. (1996). The study of language (2nd ed.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Yule, George. The Study of Language. 2nd ed. Cambridge [England] ; New York: Cambridge University Press, 1996.
Lua MLA (8ú heag.)Yule, George. The Study of Language. 2nd ed. Cambridge University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.