TY  - BOOK
AU  - Harmer, Jeremy
AU  - Harmer, Jeremy
TI  - Essential teacher knowledge:  core concepts in english language teaching/ Jeremy Harmer.    
SN  - 9781408268049
AV  - PE1128.A2 H343 2012 
U1  - PE1128.A2 H343 2012 
PY  - 2012///
PB  - Harlow : Pearson Longman
ER  -