Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Crystal, David. An Encyclopedic Dictionary of Language and Languages. London [etc.]: Penguin Books, 1994.

Cita MLA (9a ed.)

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