APA aipamena

Cambridge university. (1990). Cambridge proficiency examination practice 3 (Teacher's book). Cambridge: C.U.P.

Chicago Style aipamena

Cambridge university. Cambridge Proficiency Examination Practice 3 (Teacher's Book). Cambridge: C.U.P, 1990.

MLA aipamena

Cambridge university. Cambridge Proficiency Examination Practice 3 (Teacher's Book). Cambridge: C.U.P, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.