एपीए उद्धरण

Ur, P., & Penny Ur. (1981). Discussions that work: Task-centred fluency practice. Cambridge,New York: Cambridge University Press.

शिकागो स्टाइल उद्धरण

Ur, Penny, और Penny Ur. Discussions That Work: Task-centred Fluency Practice. Cambridge,New York: Cambridge University Press, 1981.

एमएलए उद्धरण

Ur, Penny, और Penny Ur. Discussions That Work: Task-centred Fluency Practice. Cambridge,New York: Cambridge University Press, 1981.