Citazione Stile APA (7a Edizione)
Doff, A., & Jones, C. (2004). Pre-intermediate language in use: Self-study workbook; with answer key. CUP.
Citazione stile Chigago Style (17a edizione)
Doff, Adrian, e Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. Cambridge: CUP, 2004.
Citatione MLA (9a ed.)
Doff, Adrian, e Christopher Jones. Pre-intermediate Language in Use: Self-study Workbook; with Answer Key. CUP, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.