APA (7th ed.) Citation

Gairns R. Ruth & Redman S. Stuart. (2005). Natural English. Pre-intermediate: Student's Audio CDs. New York, Oxford University Press, 2005.

Chicago Style (17th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Pre-intermediate: Student's Audio CDs. New York, Oxford University Press, 2005, 2005.

MLA (9th ed.) Citation

Gairns R. Ruth and Redman S. Stuart. Natural English. Pre-intermediate: Student's Audio CDs. New York, Oxford University Press, 2005, 2005.