Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches /
John W. Creswell.
- 3rd ed.
- Los Angeles : SAGE, 2009
- xxix, 260 p. :
Includes bibliographical references.
9781412965576 (pbk.)
Social sciences--Research--Methodology.
Social sciences--Statistical methods.
H62 / C74 2009