एपीए उद्धरण

(2009). How to master skills for the TOEFL iBT speaking: Basic. Tp. Hồ Chí Minh: Tổng hợp.

शिकागो स्टाइल उद्धरण

How to Master Skills for the TOEFL IBT Speaking: Basic. Tp. Hồ Chí Minh: Tổng hợp, 2009.

एमएलए उद्धरण

How to Master Skills for the TOEFL IBT Speaking: Basic. Tp. Hồ Chí Minh: Tổng hợp, 2009.