TY  - BOOK
AU  - Creswell, John W.
TI  -  Research design: qualitative, quantitative, and mixed methods ap proaches 
SN  - 9781452226095 (cloth)
U1  - 300.72/1  23
PY  - 2014///
CY  - Thousand Oaks
PB  - SAGE Publications
KW  - Social sciences
KW  -  Research
KW  -  Statistical methods
N1  - Includes bibliographical references (p. 251-260) and index
ER  -