TY  - BOOK
AU  - Johnson,R.Burke
AU  - Christensen,Larry
TI  - Educational research: quantitative, qualitative, and mixed approaches 
SN  - 9781506386591
PY  - 2017///
CY  - Thousand Oaks, CA
PB  - SAGE
KW  - Education
KW  - Research
N1  - Includes bibliographical references and index
ER  -