TY  - BOOK
AU  - Creswell, John W.
AU  - I.Creswell, J.David 
TI  - Research design: qualitative, quantitative and mixed methods approaches
SN  - 9781506386768
AV  - H62 .C74
PY  - 2018///
CY  - London; Los Angeles
PB  - Sage
KW  - 1.Social sciences-research methodology.2.Social sciences -statistical methods.3. Social service-methodology
KW  - Y
N1  - Y
ER  -