APA-viite (7. p.)
Doff, A., & Jones, C. (2004). Pre-intermediate language in use: Self-study workbook; with answer key. CUP.
Chicago-viite (17. p.)
Doff, Adrian, ja Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. Cambridge: CUP, 2004.
MLA-viite (9. p.)
Doff, Adrian, ja Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. CUP, 2004.
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