Scott-Barrett, F., & Fiona Scott-Barrett. (2002). New Proficiency Listening & Speaking. Longman: Pearson Education.
Chicago Style aipamenaScott-Barrett, Fiona, và Fiona Scott-Barrett. New Proficiency Listening & Speaking. Longman: Pearson Education, 2002.
MLA aipamenaScott-Barrett, Fiona, và Fiona Scott-Barrett. New Proficiency Listening & Speaking. Longman: Pearson Education, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.