APA (7th ed.) Citation

Gairns R. Ruth & Redman S. Stuart. (2006). Natural English. Elementary: Class Audio CDs. New York, Oxford University Press, 2006.

Chicago Style (17th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Elementary: Class Audio CDs. New York, Oxford University Press, 2006, 2006.

MLA (9th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Elementary: Class Audio CDs. New York, Oxford University Press, 2006, 2006.