APA (7th ed.) Citation

Trudgill, P. (1976). Sociolinguistics: An introduction (Repr.). Penguin Books.

Chicago Style (17th ed.) Citation

Trudgill, Peter. Sociolinguistics: An Introduction. Repr. Harmondsworth u.a: Penguin Books, 1976.

MLA (9th ed.) Citation

Trudgill, Peter. Sociolinguistics: An Introduction. Repr. Penguin Books, 1976.

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