(2008). TOEFL iBT activator listening: Expert. Tp. HCM: Tổng hợp.
Chicago Style aipamenaTOEFL IBT Activator Listening: Expert. Tp. HCM: Tổng hợp, 2008.
MLA aipamenaTOEFL IBT Activator Listening: Expert. Tp. HCM: Tổng hợp, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.