Doff, A., & Jones, C. (1997). Language in use: Upper-intermediate : teacher's book. Cambridge: Cambridge U. P..
Trích dẫn kiểu ChicagoDoff, Adrian, và Christopher Jones. Language in Use: Upper-intermediate : Teacher's Book. Cambridge: Cambridge U. P., 1997.
MLA引文Doff, Adrian, và Christopher Jones. Language in Use: Upper-intermediate : Teacher's Book. Cambridge: Cambridge U. P., 1997.
警告:這些引文格式不一定是100%准確.