Wardhaugh, R. (1992). An introduction to sociolinguistics (2nd ed.). Blackwell.
Lua i Stíl Chicago (17ú heag.)Wardhaugh, Ronald. An Introduction to Sociolinguistics. 2nd ed. Malden, Mass.: Blackwell, 1992.
Lua MLA (8ú heag.)Wardhaugh, Ronald. An Introduction to Sociolinguistics. 2nd ed. Blackwell, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.