APA (7th ed.) Zitazioa

Tilbury, A., Clementson, T., Hendra, L. A., & Rea, D. (2010). English unlimited: Elementary Coursebook with e-Portfolio A2. Cambridge University Press.

Chicago Style (17th ed.) Zitazioa

Tilbury, Alex, Theresa Clementson, Leslie Anne Hendra, eta David Rea. English Unlimited: Elementary Coursebook with E-Portfolio A2. Cambridge, United Kingdom: Cambridge University Press, 2010.

MLA (9th ed.) Zitazioa

Tilbury, Alex, et al. English Unlimited: Elementary Coursebook with E-Portfolio A2. Cambridge University Press, 2010.