Citazione Stile APA (7a Edizione)

Ur, P. (1991). A course in language teaching: Practice and theory. Cambridge Univ. Press.

Citazione stile Chigago Style (17a edizione)

Ur, Penny. A Course in Language Teaching: Practice and Theory. Cambridge, UK: Cambridge Univ. Press, 1991.

Citatione MLA (9a ed.)

Ur, Penny. A Course in Language Teaching: Practice and Theory. Cambridge Univ. Press, 1991.