Cita APA (7a ed.)

University of Cambridge. ESOL Examinations. (2012). Cambridge English: Proficiency 1 : with answers : authentic examination papers from Cambridge ESOL (First published.). Cambridge University Press.

Cita Chicago Style (17a ed.)

University of Cambridge. ESOL Examinations. Cambridge English: Proficiency 1 : With Answers : Authentic Examination Papers from Cambridge ESOL. First published. Cambridge: Cambridge University Press, 2012.

Cita MLA (9a ed.)

University of Cambridge. ESOL Examinations. Cambridge English: Proficiency 1 : With Answers : Authentic Examination Papers from Cambridge ESOL. First published. Cambridge University Press, 2012.