APA Citation

Wardhaugh, R., & Fuller, J. M. An introduction to sociolinguistics (Seventh edition.).

Chicago Style Citation

Wardhaugh, Ronald, and Janet M. Fuller. An Introduction to Sociolinguistics. Seventh edition.

MLA Citation

Wardhaugh, Ronald, and Janet M. Fuller. An Introduction to Sociolinguistics. Seventh edition.

Warning: These citations may not always be 100% accurate.