Carne, P. (2015). Grammar explorer 2: Student book. Boston: MA National Geographic Learning Cengage Learning.
Chicago Style aipamenaCarne, Paul. Grammar Explorer 2: Student Book. Boston: MA National Geographic Learning Cengage Learning, 2015.
MLA aipamenaCarne, Paul. Grammar Explorer 2: Student Book. Boston: MA National Geographic Learning Cengage Learning, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.