APA引文

Alex Tilbury. (2011). English unlimited. B2, Upper Intermediate Coursebook with e-Portfolio. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Alex Tilbury. English Unlimited. B2, Upper Intermediate Coursebook With E-Portfolio. Cambridge: Cambridge University Press, 2011.

MLA引文

Alex Tilbury. English Unlimited. B2, Upper Intermediate Coursebook With E-Portfolio. Cambridge: Cambridge University Press, 2011.

警告：這些引文格式不一定是100％准確.