Catt, C. (2003). Language Passport: Preparing for the ielts interview. HCM NXB trẻ.
Chicago Style aipamenaCatt, Carolyn. Language Passport: Preparing for the Ielts Interview. HCM NXB trẻ, 2003.
MLA aipamenaCatt, Carolyn. Language Passport: Preparing for the Ielts Interview. HCM NXB trẻ, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.