Julia Burchell. (2021). Cambridge Lower Secondary English Stage 9: Workbook. Collins.
Čikaški stil citiranja (17. izdanje)Julia Burchell. Cambridge Lower Secondary English Stage 9: Workbook. London: Collins, 2021.
MLA način citiranja (9. izdanje)Julia Burchell. Cambridge Lower Secondary English Stage 9: Workbook. Collins, 2021.
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