Cita APA (7th ed.)

Swan M. Michael & Smith B. Bernard. (2001). Learner English. A teacher's guide to interference and other problems (2nd ed.). Cambridge, Cambridge University Press, 2001.

Cita Chicago (17th ed.)

Swan M. Michael i Smith B. Bernard. Learner English. A Teacher's Guide to Interference and Other Problems. 2nd ed. Cambridge, Cambridge University Press, 2001, 2001.

Cita MLA (9th ed.)

Swan M. Michael i Smith B. Bernard. Learner English. A Teacher's Guide to Interference and Other Problems. 2nd ed. Cambridge, Cambridge University Press, 2001, 2001.