Cita APA (7a ed.)

McCarthy, M., McCarten, J., & Sandiford, H. (2005). Touchstone: Class Audio 1. Cambridge University Press.

Cita Chicago Style (17a ed.)

McCarthy, Michael, Jeanne McCarten, y Helen Sandiford. Touchstone: Class Audio 1. Cambridge: Cambridge University Press, 2005.

Cita MLA (9a ed.)

McCarthy, Michael, et al. Touchstone: Class Audio 1. Cambridge University Press, 2005.