Ur, P. (1988). Grammar practice activities: A practical guide for teachers. Cambridge: Cambridge University Press.
Stile di citazione ChicagoUr, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge: Cambridge University Press, 1988.
Citazione MLAUr, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge: Cambridge University Press, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.