TY  - BOOK
AU  - Creswell, John W
TI  - Research design: qualitative, quantitative, and mixed methods approaches. -- 3rd ed
SN  - 9781412965576
AV  - H 62 Cre 
PY  - 2009///
CY  - Thousand Oaks, CA
PB  - SAGE Publications
KW  - SOCIAL SCIENCES--RESEARCH--METHODOLOGY
KW  - SOCIAL SCIENCES--STATISTICAL METHODS--COMPUTER PROGRAM--EXERCISES, PROBLEMS, ETC
KW  - RESEARCH COLLABORATION
ER  -