TY  - BOOK
AU  - Creswell, John W.
TI  - Research design : : qualitative, quantitative, and mixed methods approaches 
SN  - 9781412965576
AV  - H62 .C6963 2009 
PY  - 2014///
CY  - Los Angeles
PB  -  SAGE Publications
KW  - I. Research--Methodology. II. Statistical methods
N1  - Includes index; Includes bibliographical references (p. 247-250) and indexes
UR  - Uniform Resource Identifier
ER  -