APA (7th ed.) Citation

Trudgill, P. (1974). Sociolinguistics: An introduction to language and society. Penguin Books.

Chicago Style (17th ed.) Citation

Trudgill, Peter. Sociolinguistics: An Introduction to Language and Society. London: Penguin Books, 1974.

MLA (8th ed.) Citation

Trudgill, Peter. Sociolinguistics: An Introduction to Language and Society. Penguin Books, 1974.

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