Hartley, B., & Viney, P. Streamline english. departures: Workbook a units 1-40 (23a ed.).
Čikaški stil citiranja (17. izdanje)Hartley, Bernard, i Peter Viney. Streamline English. Departures: Workbook a Units 1-40. 23a ed.
MLA način citiranja (8. izdanje)Hartley, Bernard, i Peter Viney. Streamline English. Departures: Workbook a Units 1-40. 23a ed.
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