Cita APA

 Harmer, J. (2012).  Essential Teacher Knowledge: Core concepts in english language teaching.  Pearson Education Limited.

Citación estilo Chicago

 Harmer, Jeremy.  Essential Teacher Knowledge: Core Concepts in English Language Teaching.  Pearson Education Limited, 2012.

Cita MLA

 Harmer, Jeremy.  Essential Teacher Knowledge: Core Concepts in English Language Teaching.  Pearson Education Limited, 2012.

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