Ur, P. (1988). Grammar practice activities: Practical guide for teachers. Cambridge: Cambridge University Press.
Style de citation ChicagoUr, Penny. Grammar Practice Activities: Practical Guide for Teachers. Cambridge: Cambridge University Press, 1988.
Style de citation MLAUr, Penny. Grammar Practice Activities: Practical Guide for Teachers. Cambridge: Cambridge University Press, 1988.
Attention : ces citations peuvent ne pas être correctes à 100%.