Jones, L. (1986). Progress to proficiency: Student's book. Cambridge: Cambridge Univ. Press.
シカゴスタイル引用形Jones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.
MLA引用形式Jones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.
警告: この引用は必ずしも正確ではありません.