Cita APA (7a ed.)

Crystal, D. (1985). Linguistics (2nd ed.,[rep. 1985].). Penguin books.

Cita Chicago Style (17a ed.)

Crystal, David. Linguistics. 2nd ed.,[rep. 1985]. New York [etc.]: Penguin books, 1985.

Cita MLA (9a ed.)

Crystal, David. Linguistics. 2nd ed.,[rep. 1985]. Penguin books, 1985.