एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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