Campbell, C., & Hanna Kryszewska. Learner-based teaching (6a ed.).
Cita Chicago (17th ed.)Campbell, Colin, i Hanna Kryszewska. Learner-based Teaching. 6a ed.
Cita MLA (8th ed.)Campbell, Colin, i Hanna Kryszewska. Learner-based Teaching. 6a ed.
Atenció: Aquestes cites poden no estar 100% correctes.