APA引文

Không rõ. (2009). New TOEIC 4n4: Four weeks for weakness.520 level. TH.HCM.

Trích dẫn kiểu Chicago

Không rõ. New TOEIC 4n4: Four Weeks for Weakness.520 Level. TH.HCM, 2009.

MLA引文

Không rõ. New TOEIC 4n4: Four Weeks for Weakness.520 Level. TH.HCM, 2009.

警告：這些引文格式不一定是100％准確.