Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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