APA

Crystal D., . (1994). Encyclopaedic dictionary of language and languages. : Penguin Books, London.

Chicago

Crystal David, . 1994. Encyclopaedic dictionary of language and languages. : Penguin Books, London.

Harvard

Crystal D., . (1994). Encyclopaedic dictionary of language and languages. : Penguin Books, London.

MLA

Crystal David, . Encyclopaedic dictionary of language and languages. : Penguin Books, London. 1994.