TY  - BOOK
AU  - JOHNSON,Burke
AU  - CHRISTENSEN,Larry
TI  - Educational research: quantitative, qualitative, and mixed approaches 
SN  - 9781506386591
PY  - 2017///
CY  - Los Angeles 
PB  - Sage
KW  - Education
KW  - Research
N1  - Includes bibliographical references and index
ER  -