APA (7th ed.) Citation

Wardhaugh, R. (1998). An introduction to sociolinguistics (3. ed.). Blackwell.

Chicago Style (17th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 3. ed. Malden, Mass. [u.a.]: Blackwell, 1998.

MLA (9th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 3. ed. Blackwell, 1998.