APA

Crystal D., Johnson S., . (2006). A dictionary of the english language. : Penguin books.

Chicago

Crystal David, Johnson Samuel, . 2006. A dictionary of the english language. : Penguin books.

Harvard

Crystal D., Johnson S., . (2006). A dictionary of the english language. : Penguin books.

MLA

Crystal David, Johnson Samuel, . A dictionary of the english language. : Penguin books. 2006.