Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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