APA引文

Collins. (2014). Cambridge English Key Four practice tests: Key (Ket). Viet Nam: Cty TNHH Nhân Trí Việt.

Trích dẫn kiểu Chicago

Collins. Cambridge English Key Four Practice Tests: Key (Ket). Viet Nam: Cty TNHH Nhân Trí Việt, 2014.

MLA引文

Collins. Cambridge English Key Four Practice Tests: Key (Ket). Viet Nam: Cty TNHH Nhân Trí Việt, 2014.

警告：這些引文格式不一定是100％准確.