McCarthy, M., McCarten, J., & Sandiford, H. (2005). Touchstone: Class Audio 1. Cambridge: Cambridge University Press.
Chicago Style aipamenaMcCarthy, Michael, Jeanne McCarten, and Helen Sandiford. Touchstone: Class Audio 1. Cambridge: Cambridge University Press, 2005.
MLA aipamenaMcCarthy, Michael, Jeanne McCarten, and Helen Sandiford. Touchstone: Class Audio 1. Cambridge: Cambridge University Press, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.