TY  - BOOK
AU  - Creswell, John W.
TI  - Research design: qualitative, quantitative, and mixed methods approaches
SN  - 9791412965569
U1  - GSL 300.72 C865 2009 
PY  - 2009///
CY  - Los Angeles, California
PB  - SAGE Publications, Inc.
KW  - Behavioral Sciences methods
N1  - Includes bibliographical references and indexes
ER  -