Doff, A., & Jones, C. (1999). Language in use: Beginner: classroom book. Cambridge: Cambridge U. P..
シカゴスタイル引用形Doff, Adrian, , Christopher Jones. Language in Use: Beginner: Classroom Book. Cambridge: Cambridge U. P., 1999.
MLA引用形式Doff, Adrian, , Christopher Jones. Language in Use: Beginner: Classroom Book. Cambridge: Cambridge U. P., 1999.
警告: この引用は必ずしも正確ではありません.