Cita APA (7a ed.)

Crystal, D. (2011). David Crystal's Introduction to language: A complete course. Routledge.

Cita Chicago Style (17a ed.)

Crystal, David. David Crystal's Introduction to Language: A Complete Course. Abingdon: Routledge, 2011.

Cita MLA (9a ed.)

Crystal, David. David Crystal's Introduction to Language: A Complete Course. Routledge, 2011.