TY  - BOOK
AU  - Cresswell, John W.
TI  - Research design: qualitative, quantitative, and mixes methods approaches 
U1  - 23 300.721
PY  - 2014///
CY  - Thousand Oaks, California
PB  - Sage
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
N1  - Includes bibliographical references and index
ER  -