APA aipamena

Gairns R. Ruth & Redman S. Stuart. (2007). Natural English. Pre-intermediate: Student's Book. New York, Oxford University Press, 2007.

Chicago Style aipamena

Gairns R. Ruth and Redman S. Stuart. Natural English. Pre-intermediate: Student's Book. New York, Oxford University Press, 2007, 2007.

MLA aipamena

Gairns R. Ruth and Redman S. Stuart. Natural English. Pre-intermediate: Student's Book. New York, Oxford University Press, 2007, 2007.