APA (7th ed.) Citation

Crystal, D. (1992). Introducing linguistics / David Crystal. Penguin Books.

Chicago Style (17th ed.) Citation

Crystal, David. Introducing Linguistics / David Crystal. Penguin Books, 1992.

MLA (9th ed.) Citation

Crystal, David. Introducing Linguistics / David Crystal. Penguin Books, 1992.

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