APA aipamena

Scott L. Lyn & Scott D. David. (2009). Natural English. Pre-intermediate: Workbook. New York, Oxford University Press, 2009.

Chicago Style aipamena

Scott L. Lyn and Scott D. David. Natural English. Pre-intermediate: Workbook. New York, Oxford University Press, 2009, 2009.

MLA aipamena

Scott L. Lyn and Scott D. David. Natural English. Pre-intermediate: Workbook. New York, Oxford University Press, 2009, 2009.