Helgesen, M., Brown, S., & Smith, D. (1997). Active listening: Expanding understanding through content : teachers edition 3. Cambridge: Cambridge University Press.
Stile di citazione ChicagoHelgesen, Marc., Steven Brown, e Dorolyn Smith. Active Listening: Expanding Understanding Through Content : Teachers Edition 3. Cambridge: Cambridge University Press, 1997.
Citazione MLAHelgesen, Marc., Steven Brown, e Dorolyn Smith. Active Listening: Expanding Understanding Through Content : Teachers Edition 3. Cambridge: Cambridge University Press, 1997.
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