APA (7th ed.) Citation

Gairns R. Ruth & Redman S. Stuart. (2003). Natural English. Upper-intermediate: Class Audio CDs. New York, Oxford University Press, 2003.

Chicago Style (17th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Upper-intermediate: Class Audio CDs. New York, Oxford University Press, 2003, 2003.

MLA (9th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Upper-intermediate: Class Audio CDs. New York, Oxford University Press, 2003, 2003.