एपीए उद्धरण

Pierce, D., & Douglas Pierce and Sean Kinsell. (2007). Cracking the TOEFL iBT. Tp. Hồ Chí Minh: Trẻ.

शिकागो स्टाइल उद्धरण

Pierce, Douglas, और Douglas Pierce and Sean Kinsell. Cracking the TOEFL IBT. Tp. Hồ Chí Minh: Trẻ, 2007.

एमएलए उद्धरण

Pierce, Douglas, और Douglas Pierce and Sean Kinsell. Cracking the TOEFL IBT. Tp. Hồ Chí Minh: Trẻ, 2007.