Citazione Stile APA (7a Edizione)

Hashemi, L., & Thomas, B. (2010). Objetive Pet: Student´s book with answers (2nd ed.). Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

Hashemi, Louise, e Barbara Thomas. Objetive Pet: Student´s Book with Answers. 2nd ed. Cambridge: Cambridge University Press, 2010.

Citatione MLA (9a ed.)

Hashemi, Louise, e Barbara Thomas. Objetive Pet: Student´s Book with Answers. 2nd ed. Cambridge University Press, 2010.