Research design :
Cresswell, John W.
Research design : qualitative, quantitative, and mixes methods approaches / John W. Creswell - 4th ed. - Thousand Oaks : California : Sage, 2014. - xxix, 273p. : col. ill.; 26cm.
Includes bibliographical references and index
Social sciences--Methodology--Research
Social sciences--Statistical methods
23
Research design : qualitative, quantitative, and mixes methods approaches / John W. Creswell - 4th ed. - Thousand Oaks : California : Sage, 2014. - xxix, 273p. : col. ill.; 26cm.
Includes bibliographical references and index
Social sciences--Methodology--Research
Social sciences--Statistical methods
23