Ur, P. (1996). Grammar practice activities: A practical guide for teachers. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge ; New York: Cambridge University Press, 1996.
Lua MLA (8ú heag.)Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.