University of Cambridge ESOL Examinations. (2012). Cambridge English: Proficiency 1 with answers: authentic examination papers from Cambridge ESOL. Cambridge University Press.
Citação norma ChicagoUniversity of Cambridge ESOL Examinations. Cambridge English: Proficiency 1 with Answers: Authentic Examination Papers from Cambridge ESOL. Cambridge: Cambridge University Press, 2012.
Citação norma MLAUniversity of Cambridge ESOL Examinations. Cambridge English: Proficiency 1 with Answers: Authentic Examination Papers from Cambridge ESOL. Cambridge University Press, 2012.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.