APA (7th ed.) Citation

Wardhaugh, R. (1998). An introduction to sociolinguistics (3rd edition.).

Chicago Style (17th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 3rd edition. 1998.

MLA (8th ed.) Citation

Wardhaugh, Ronald. An Introduction to Sociolinguistics. 3rd edition. 1998.

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