Corbett,Edward P J. (1999). The writing teachers sourcebook. Oxford University Press.
Chicago Style aipamenaCorbett,Edward P J. The Writing Teachers Sourcebook. New York: Oxford University Press, 1999.
MLA aipamenaCorbett,Edward P J. The Writing Teachers Sourcebook. Oxford University Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.