Citazione Stile APA (7a Edizione)

Capel A. Annette & Sharp W. Wendy. (2007). Objective First Certificate: Student's Book. Cambridge, Cambridge University Press, 2007.

Citazione stile Chigago Style (17a edizione)

Capel A. Annette e Sharp W. Wendy. Objective First Certificate: Student's Book. Cambridge, Cambridge University Press, 2007, 2007.

Citatione MLA (9a ed.)

Capel A. Annette e Sharp W. Wendy. Objective First Certificate: Student's Book. Cambridge, Cambridge University Press, 2007, 2007.