Cita APA (7a ed.)

Trudgill, P. (1974). Sociolinguistics: An introduction. Penguin.

Cita Chicago Style (17a ed.)

Trudgill, Peter. Sociolinguistics: An Introduction. Harmondsworth: Penguin, 1974.

Cita MLA (9a ed.)

Trudgill, Peter. Sociolinguistics: An Introduction. Penguin, 1974.