APA Style

Trudgill, Peter. (1974). Sociolinguistics: An Introduction . Harmondsworth: Penguin Book Ltd..

Chicago Style

Trudgill, Peter. Sociolinguistics: An Introduction. Harmondsworth: Penguin Book Ltd., 1974. Text.

MLA Style

Trudgill, Peter. Sociolinguistics: An Introduction. Harmondsworth: Penguin Book Ltd., 1974. Text.

Turabian Style

Trudgill, Peter. Sociolinguistics: An Introduction. Harmondsworth: Penguin Book Ltd., 1974. Print.