Ur, P. (1981). Discussions that work: Task-centred fluency practice. Univ. Pr.
Chicago-čujuhus (17. p.)Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge: Univ. Pr, 1981.
MLA-čujuhus (9. p.)Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Univ. Pr, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.