Campbell, C., & Hanna Kryszewska. Learner-based teaching (6a ed.).
Cita Chicago Style (17a ed.)Campbell, Colin, y Hanna Kryszewska. Learner-based Teaching. 6a ed.
Cita MLA (8a ed.)Campbell, Colin, y Hanna Kryszewska. Learner-based Teaching. 6a ed.
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