APA (7th ed.) Citation

Wardhaugh, R. (1992). An introduction to sociolinguistics (2a. ed.). Blackwell.

Chicago Style (17th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 2a. ed. Oxford: Blackwell, 1992.

MLA (9th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 2a. ed. Blackwell, 1992.