APA (7th ed.) Citation

Wardhaugh, R. (1986). An introduction to sociolinguistics. Blackwell.

Chicago Style (17th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. Oxford (Oxfordshire) ; New York: Blackwell, 1986.

MLA (9th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. Blackwell, 1986.