APA (7th ed.) Citation

Crystal, D. (1992). An encyclopedic dictionary of language and languages. Penguin Books.

Chicago Style (17th ed.) Citation

Crystal, David. An Encyclopedic Dictionary of Language and Languages. London: Penguin Books, 1992.

MLA (9th ed.) Citation

Crystal, David. An Encyclopedic Dictionary of Language and Languages. Penguin Books, 1992.

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