Cita APA (7a ed.)

Trudgill, P. (2000). Sociolinguistics: An introduction to language and society (4th ed.). Penguin.

Cita Chicago Style (17a ed.)

Trudgill, Peter. Sociolinguistics: An Introduction to Language and Society. 4th ed. London [etc.]: Penguin, 2000.

Cita MLA (9a ed.)

Trudgill, Peter. Sociolinguistics: An Introduction to Language and Society. 4th ed. Penguin, 2000.