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