APA (7e ed.) Bronvermelding

Ur, P., & Swan, M. (2009). Grammar Practice Activities. A practical guide for teachers (Second edition.). Cambridge University Press.

Chicago (17e ed.) Bronvermelding

Ur, Penny, en Michael Swan. Grammar Practice Activities. A Practical Guide for Teachers. Second edition. Cambridge, United Kingdom: Cambridge University Press, 2009.

MLA (9e ed.) Bronvermelding

Ur, Penny, en Michael Swan. Grammar Practice Activities. A Practical Guide for Teachers. Second edition. Cambridge University Press, 2009.