TY  - BOOK
AU  - Cohen, Lewis et al.
AU  - Manion, Lawrence
AU  - Morrison, Keith
TI  - Research methods in education  
SN  - 0-415-19541-1
U1  - 370.72 
PY  - 2007///
CY  - London
PB  - Routledge
KW  - Education- Research methods
ER  -