Dyfyniad APA

Ur, P. (1981). Discussions that work. Cambridge University Press.

Dyfyniad Arddull Chicago

Ur, Penny. Discussions That Work. Cambridge: Cambridge University Press, 1981.

Dyfyniad MLA

Ur, Penny. Discussions That Work. Cambridge University Press, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.