Edmunds, P. (2011). Developing skills for the TOEFL iBT, intermediate. Tp.HCM: Nxb. Trẻ.
Chicago Style aipamenaEdmunds, Paul. Developing Skills for the TOEFL IBT, Intermediate. Tp.HCM: Nxb. Trẻ, 2011.
MLA aipamenaEdmunds, Paul. Developing Skills for the TOEFL IBT, Intermediate. Tp.HCM: Nxb. Trẻ, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.