TY  - BOOK
AU  - Johnson,Burke
AU  - Christensen,Larry B.
TI  - Educational research: quantitative, qualitative, and mixed approaches 
SN  - 9781412978286 (cloth)
AV  - LB 1028 J59.2012
PY  - 2012///
CY  - Thousand Oaks, Calif.
PB  - SAGE
KW  - Educación -
KW  - Investigación
ER  -