TY  - BOOK
AU  - Fraenkel,Jack R.
AU  - Hyun,Helen H.
AU  - Wallen,Norman E.
TI  - How to Design and Evaluate y Research in Education
U1  - 428 F799h 2012 
PY  - 2012///
CY  - USA
PB  - McGraw-Hill Interamericana, 
KW  - INGLES
KW  - EDUCACION
ER  -