Citazione Stile APA (7a Edizione)

Swan, M., & Baker, D. (2008). Grammar scan answer key (Third edition.). Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Swan, Michael, e David Baker. Grammar Scan Answer Key. Third edition. New York: Oxford University Press, 2008.

Citatione MLA (9a ed.)

Swan, Michael, e David Baker. Grammar Scan Answer Key. Third edition. Oxford University Press, 2008.