APA (7th ed.) Citation

Crystal, D. (1994). An encyclopedic dictionary of language and languages. Penguin.

Chicago Style (17th ed.) Citation

Crystal, David. An Encyclopedic Dictionary of Language and Languages. London: Penguin, 1994.

MLA (8th ed.) Citation

Crystal, David. An Encyclopedic Dictionary of Language and Languages. Penguin, 1994.

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