TY  - BOOK
AU  - Harmer,Jeremy
TI  - Essential teacher knowledge: core concepts in English language teching 
SN  - 9781408268049 (pbk.) 
PY  - 2012///
CY  - Harlow, England
PB  - Pearson Education Limited
KW  - English language
KW  - Textbooks for foreign speakers
ER  -