APA-čujuhus (7. p.)
Ur, P. (1988). Grammar practice activities: A practical guide for teachers. CUP.
Chicago-čujuhus (17. p.)
Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge: CUP, 1988.
MLA-čujuhus (9. p.)
Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. CUP, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.