APA (7th ed.) Zitazioa

Swan, M., & Walter, C. (2011). Oxford english grammar course: Intermediate. Oxford University Press.

Chicago Style (17th ed.) Zitazioa

Swan, Michael, eta Catherine Walter. Oxford English Grammar Course: Intermediate. New York: Oxford University Press, 2011.

MLA (9th ed.) Zitazioa

Swan, Michael, eta Catherine Walter. Oxford English Grammar Course: Intermediate. Oxford University Press, 2011.