a. (2001). Cambridge certificate of proficiency in English (Student's book with answer). Oxford: Cambridge University Press.
シカゴスタイル引用形a. Cambridge Certificate of Proficiency in English (Student's Book With Answer). Oxford: Cambridge University Press, 2001.
MLA引用形式a. Cambridge Certificate of Proficiency in English (Student's Book With Answer). Oxford: Cambridge University Press, 2001.
警告: この引用は必ずしも正確ではありません.