Cita APA (7a ed.)

Wardhaugh, R. (1990). An introduction to sociolinguistics. Basil Blackwell.

Cita Chicago Style (17a ed.)

Wardhaugh, Ronald. An Introduction to Sociolinguistics. Oxford: Basil Blackwell, 1990.

Cita MLA (9a ed.)

Wardhaugh, Ronald. An Introduction to Sociolinguistics. Basil Blackwell, 1990.