Littejohn, A. (1997). Cambridge english for schools: Workbook cassette. Cambridge: Cambridge University Press.
Dyfyniad Arddull ChicagoLittejohn, Andrew. Cambridge English for Schools: Workbook Cassette. Cambridge: Cambridge University Press, 1997.
Dyfyniad MLALittejohn, Andrew. Cambridge English for Schools: Workbook Cassette. Cambridge: Cambridge University Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.