Barraclough, C. (2010). Activate B1: Students' book. Harlow: Pearson.
Chicago Style aipamenaBarraclough, Carolyn. Activate B1: Students' Book. Harlow: Pearson, 2010.
MLA aipamenaBarraclough, Carolyn. Activate B1: Students' Book. Harlow: Pearson, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.