334599 Harmer, J. (2012). Essential teacher knowledge [electronic resources]: Core concepts in english language teaching. England: Pearson Longman.
Citazione stile Chigago Style (17a edizione)334599 Harmer, Jeremy. Essential Teacher Knowledge [electronic Resources]: Core Concepts in English Language Teaching. England: Pearson Longman, 2012.
Citatione MLA (9a ed.)334599 Harmer, Jeremy. Essential Teacher Knowledge [electronic Resources]: Core Concepts in English Language Teaching. England: Pearson Longman, 2012.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.