APA aipamena

Worcester, A., Eric Williamson, & Lark Bowerman. (2007). Building Skills for the TOEFL iBT: Beginning. TP. Hồ Chí Minh: Trẻ; First News.

Chicago Style aipamena

Worcester, Adam, Eric Williamson, và Lark Bowerman. Building Skills for the TOEFL IBT: Beginning. TP. Hồ Chí Minh: Trẻ; First News, 2007.

MLA aipamena

Worcester, Adam, Eric Williamson, và Lark Bowerman. Building Skills for the TOEFL IBT: Beginning. TP. Hồ Chí Minh: Trẻ; First News, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.