Swan, M., & Walter, C. (1997). The New Cambridge English Course II: Student and Practice. New York: Cambridge University Press.
Chicago Style aipamenaSwan, Michael, và Catherine Walter. The New Cambridge English Course II: Student and Practice. New York: Cambridge University Press, 1997.
MLA aipamenaSwan, Michael, và Catherine Walter. The New Cambridge English Course II: Student and Practice. New York: Cambridge University Press, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.