Doff, A., & Jones, C. (1999). Language in use: Intermediate self-study workbook with answer key. Oxford: OUP.
Chicago Style CitationDoff, Adrian, and Christopher Jones. Language in Use: Intermediate Self-study Workbook With Answer Key. Oxford: OUP, 1999.
MLA CitationDoff, Adrian, and Christopher Jones. Language in Use: Intermediate Self-study Workbook With Answer Key. Oxford: OUP, 1999.
Warning: These citations may not always be 100% accurate.