(1987). Cambridge proficiency examination practice 2 (teacher's book). Cambridge, UK: Cambridge Univ. Press.
シカゴスタイル引用形Cambridge Proficiency Examination Practice 2 (teacher's Book). Cambridge, UK: Cambridge Univ. Press, 1987.
MLA引用形式Cambridge Proficiency Examination Practice 2 (teacher's Book). Cambridge, UK: Cambridge Univ. Press, 1987.
警告: この引用は必ずしも正確ではありません.