Kallio, S. (2016). Start talking!: A communicative material package for the upper secondary school oral English course.
Chicago-viite (17. p.)Kallio, Sanni. Start Talking!: A Communicative Material Package for the Upper Secondary School Oral English Course. 2016.
MLA-viite (9. p.)Kallio, Sanni. Start Talking!: A Communicative Material Package for the Upper Secondary School Oral English Course. 2016.
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