Cita APA

University of Cambridge (Gran Bretaña). ESOL examinations. (2012). Cambridge English: Proficiency 1 : with answers (5a ed.). Cambridge, United Kingdom: Cambridge University Press.

Citación estilo Chicago

University of Cambridge (Gran Bretaña). ESOL examinations. Cambridge English: Proficiency 1 : With Answers. 5a ed. Cambridge, United Kingdom: Cambridge University Press, 2012.

Cita MLA

University of Cambridge (Gran Bretaña). ESOL examinations. Cambridge English: Proficiency 1 : With Answers. 5a ed. Cambridge, United Kingdom: Cambridge University Press, 2012.