APA (7e ed.) Bronvermelding
Ur, P. (1988). Grammar practice activities: A practical guide for teachers. CUP.
Chicago (17e ed.) Bronvermelding
Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge: CUP, 1988.
MLA (9e ed.) Bronvermelding
Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. CUP, 1988.
Let op: Deze citaties zijn niet altijd 100% accuraat.