TY  - BOOK
AU  - Johnson,Burke
AU  - Christensen,Larry B.
TI  - Educational research: quantitative, qualitative, and mixed approaches 
SN  - 9781544372174
U1  - 370.72 
PY  - 2020///]
CY  - Los Angeles
PB  - SAGE Publications, Inc.
KW  - Education research
N1  - Sixth edition: 2017; Includes bibliographical references and indexes
ER  -