University of Cambridge. (2010). Cambridge preliminary English test 6 with answers: Examination papers from University of Cambridge ESOL examinations: English for Speakers of Other Languages. New York: Cambridge university press.
استشهاد بنمط شيكاغوUniversity of Cambridge. Cambridge Preliminary English Test 6 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2010.
MLA استشهادUniversity of Cambridge. Cambridge Preliminary English Test 6 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.