Cita APA

(2016). The vocabulary files: English usage :Advanced (CEF level C1). Tổng hợp.

Chicago Style Citation

The Vocabulary Files: English Usage :Advanced (CEF Level C1). Tổng hợp, 2016.

Cita MLA

The Vocabulary Files: English Usage :Advanced (CEF Level C1). Tổng hợp, 2016.

Atenció: Aquestes cites poden no estar 100% correctes.