Doff, A., & Jones, C. (2000). Language in use: Pre-intermediate : self-study workbook with answer key [Băng Casset] (New ed.). Cambridge: Cambridge U. P..
استشهاد بنمط شيكاغوDoff, Adrian, و Christopher Jones. Language in Use: Pre-intermediate : Self-study Workbook With Answer Key [Băng Casset]. New ed. Cambridge: Cambridge U. P., 2000.
MLA استشهادDoff, Adrian, و Christopher Jones. Language in Use: Pre-intermediate : Self-study Workbook With Answer Key [Băng Casset]. New ed. Cambridge: Cambridge U. P., 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.