(2002). Headway: Pre- Intermediate. New York: Mc Graw-Hill.
Chicago Style CitationHeadway: Pre- Intermediate. New York: Mc Graw-Hill, 2002.
Cita MLAHeadway: Pre- Intermediate. New York: Mc Graw-Hill, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.