McCarthy, M., McCarten, J., & Sandiford, H. (2005). Touchstone: Class Audio 1. Cambridge University Press.
Chicago-čujuhus (17. p.)McCarthy, Michael, Jeanne McCarten, juo Helen Sandiford. Touchstone: Class Audio 1. Cambridge: Cambridge University Press, 2005.
MLA-čujuhus (9. p.)McCarthy, Michael, et al. Touchstone: Class Audio 1. Cambridge University Press, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.