Creswell, John W.

Research design : qualitative, quantitative, and mixed methods approaches / John W. Creswell. - 4th ed. - Thousand Oaks : SAGE Publications, 2014. - xxix, 273 p. : ill., charts, port.

Includes bibliographical references (p. 251-260) and indexes.


Social sciences--Research--Methodology.
Social sciences--Statistical methods.

H62