APA (7th ed.) Citation
Doff, A., & Jones, C. (2004). Pre-intermediate language in use: Self-study workbook; with answer key. CUP.
Chicago Style (17th ed.) Citation
Doff, Adrian, and Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. Cambridge: CUP, 2004.
MLA (9th ed.) Citation
Doff, Adrian, and Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. CUP, 2004.
Warning: These citations may not always be 100% accurate.