Ur, P., & Swan, M. (2009). Grammar Practice Activities. A practical guide for teachers (Second edition.). Cambridge University Press.
Chicago-čujuhus (17. p.)Ur, Penny, juo Michael Swan. Grammar Practice Activities. A Practical Guide for Teachers. Second edition. Cambridge, United Kingdom: Cambridge University Press, 2009.
MLA-čujuhus (9. p.)Ur, Penny, juo Michael Swan. Grammar Practice Activities. A Practical Guide for Teachers. Second edition. Cambridge University Press, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.