Sevilla Morales, H., & Gamboa Mena, R. (2015). Interactions 1 as an ELT coursebook: A curricular and theory-based scrutiny. Universidad de Costa Rica.
Tohutoru Kātū Chicago (17th ed.)Sevilla Morales, Henry, me Roy Gamboa Mena. Interactions 1 as an ELT Coursebook: A Curricular and Theory-based Scrutiny. Universidad de Costa Rica, 2015.
Tohutoro MLA (9th ed.)Sevilla Morales, Henry, me Roy Gamboa Mena. Interactions 1 as an ELT Coursebook: A Curricular and Theory-based Scrutiny. Universidad de Costa Rica, 2015.
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