Research design : qualitative, quantitative, and mixed methods approaches /
John W. Creswell [and] J. David Creswell.
- 5th ed.
- Los Angeles : Sage, 2018.
- xxv, 275 p. ill., charts.
Includes bibliographical references.
9781506386706 (pbk. )
Social sciences--Research--Methodology. Social sciences--Statistical methods.