Cambridge ESOL. (2009). Student's Book with Answers: Examination Papers from University of Cambridge ESOL Examinations: Cambridge ESOL.
Citazione stile Chigago Style (17a edizione)Cambridge ESOL. Student's Book with Answers: Examination Papers from University of Cambridge ESOL Examinations: Cambridge ESOL. Cambridge University Press, 2009.
Citatione MLA (9a ed.)Cambridge ESOL. Student's Book with Answers: Examination Papers from University of Cambridge ESOL Examinations: Cambridge ESOL. 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.