APA-viite (7. p.)
Okon, K. (2014). Teaching english effectively: With special focus on learners' interests. Anchor Academic Publishing.
Chicago-viite (17. p.)
Okon, Katharina. Teaching English Effectively: With Special Focus on Learners' Interests. Hamburg, Germany: Anchor Academic Publishing, 2014.
MLA-viite (9. p.)
Okon, Katharina. Teaching English Effectively: With Special Focus on Learners' Interests. Anchor Academic Publishing, 2014.
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