एपीए उद्धरण

Worcester, A., & Adam Worcester; Lark Bowerman; Eric Williamson. (2007). Building skills for the Toefl iBT: Beginning. Tp. Hồ Chí Minh: Trẻ.

शिकागो स्टाइल उद्धरण

Worcester, Adam, और Adam Worcester; Lark Bowerman; Eric Williamson. Building Skills for the Toefl IBT: Beginning. Tp. Hồ Chí Minh: Trẻ, 2007.

एमएलए उद्धरण

Worcester, Adam, और Adam Worcester; Lark Bowerman; Eric Williamson. Building Skills for the Toefl IBT: Beginning. Tp. Hồ Chí Minh: Trẻ, 2007.