Citazione Stile APA (7a Edizione)

Scott L. Lyn & Scott D. David. (2003). Natural English. Intermediate: Workbook (2-ed.). New York, Oxford University Press, 2003.

Citazione stile Chigago Style (17a edizione)

Scott L. Lyn e Scott D. David. Natural English. Intermediate: Workbook. 2-ed. New York, Oxford University Press, 2003, 2003.

Citatione MLA (9a ed.)

Scott L. Lyn e Scott D. David. Natural English. Intermediate: Workbook. 2-ed. New York, Oxford University Press, 2003, 2003.