Ur, P. (1981). Discussions that work: Task-centred fluency practice. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge ; New York: Cambridge University Press, 1981.
Lua MLA (8ú heag.)Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge University Press, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.