Ur, P. (2011). A course in language teaching: Trainee book (11th printing.). Cambridge University Press.
Cita Chicago Style (17a ed.)Ur, Penny. A Course in Language Teaching: Trainee Book. 11th printing. Cambridge [etc.]: Cambridge University Press, 2011.
Cita MLA (9a ed.)Ur, Penny. A Course in Language Teaching: Trainee Book. 11th printing. Cambridge University Press, 2011.
Precaución: Estas citas no son 100% exactas.