TY  - BOOK
AU  - Johnson,Burke
AU  - Christensen,Larry B.
TI  - Educational research: quantitative, qualitative, and mixed approaches 
SN  - 9781452244402
U1  - 370.72 
PY  - 2014///
CY  - Los Angeles
PB  - SAGE
KW  - Education
KW  - Research
ER  -