Sarah Briggs...[et al.]. (1997). The University of Michigan examination for the certificate of proficiency in English (Official past papers - Student's book). Oxford: Oxford Univ. Press.
استشهاد بنمط شيكاغوSarah Briggs...[et al.]. The University of Michigan Examination for the Certificate of Proficiency in English (Official Past Papers - Student's Book). Oxford: Oxford Univ. Press, 1997.
MLA استشهادSarah Briggs...[et al.]. The University of Michigan Examination for the Certificate of Proficiency in English (Official Past Papers - Student's Book). Oxford: Oxford Univ. Press, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.