Hudson, R. A. (2001). Sociolinguistics (2nd ed.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Hudson, Richard A. Sociolinguistics. 2nd ed. Cambridge [England] ; New York, NY, USA: Cambridge University Press, 2001.
Lua MLA (8ú heag.)Hudson, Richard A. Sociolinguistics. 2nd ed. Cambridge University Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.