Research design :

Creswell, John W.

Research design : qualitative, quantitative, and mixed methods approaches / John W. Creswell. - 4th edition - Thousand Oaks : SAGE Publications, c2014. - xxix, 273 pages : illustrations ; 26 cm.

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

9781452226101 (pbk.) 9781452226095 (cloth)

2012043521

H62 / .C6963 2014

300.721