Doff, A., & Jones, C. (2000). Language in use: Pre-intermediate : self-study workbook with answer key (New ed.). Cambridge: Cambridge U. P..
Παραπομπή Chicago StyleDoff, Adrian, και Christopher Jones. Language in Use: Pre-intermediate : Self-study Workbook With Answer Key. New ed. Cambridge: Cambridge U. P., 2000.
Παραπομπή MLADoff, Adrian, και Christopher Jones. Language in Use: Pre-intermediate : Self-study Workbook With Answer Key. New ed. Cambridge: Cambridge U. P., 2000.
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