Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Ur, Penny. A Course in Language Teaching: Practice and Theory. Cambridge [England] ; New York: Cambridge University Press, 1991.

Cita MLA (8th ed.)

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