Cambridge University Press. (2011). Cambridge Key English Test 4: Examination Papers from University of Cambridge ESOL Examinations english for sprakers of other languages. Vietnam: Fahasa.
استشهاد بنمط شيكاغوCambridge University Press. Cambridge Key English Test 4: Examination Papers From University of Cambridge ESOL Examinations English for Sprakers of Other Languages. Vietnam: Fahasa, 2011.
MLA استشهادCambridge University Press. Cambridge Key English Test 4: Examination Papers From University of Cambridge ESOL Examinations English for Sprakers of Other Languages. Vietnam: Fahasa, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.