Cita APA

(2002). Headway: Advanced. New York: Mc Graw-Hill.

Chicago Style Citation

Headway: Advanced. New York: Mc Graw-Hill, 2002.

Cita MLA

Headway: Advanced. New York: Mc Graw-Hill, 2002.

Atenció: Aquestes cites poden no estar 100% correctes.