TY  - BOOK
AU  - Christensen, Larry B.
AU  - R.Burke Johnson, Lisa A. Turner
TI  - Research Methods, Design, and Analysis
SN  - 9781292057743
U1  - 150.72 
PY  - 2015///
CY  - England 
PB  - Pearson 
KW  - Understanding Scientific Research ,Research Approaches and Data Collection Methods
N1  - including Refrences ,index
ER  -