Cita APA (7th ed.)
Richards, J. C. (2002). Changes: English for international communication. Cambridge university press.
Cita Chicago (17th ed.)
Richards, Jack C. Changes: English for International Communication. Cambridge: Cambridge university press, 2002.
Cita MLA (9th ed.)
Richards, Jack C. Changes: English for International Communication. Cambridge university press, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.