Creswell, John W. Educational Research : planning, conducting, and evaluating quantitative and qualitative research / John W. Creswell. - 5th ed. - New York : Pearson, c2015 - xxii, 645 p. ; 24 cm. Include index and bibliographical references ISBN: 9780133549584 0133549585 Subjects--Topical Terms: Education--Research--MethodologyEducation--Research Dewey Class. No.: 370.72 / CRE 2015