00648nam a2200181 a 45000010006000000050017000060080041000230200018000640500019000821000021001012450099001222500011002212600048002323000034002805040065003146500046003796500041004253350020230531230949.0150716s2014    xxum         a001 0 eng d  a9781452226095 4aH62bC923 20141 aCreswell, John W10aResearch design :bqualitative, quantitative, and mixed methods approaches /cJohn W. Creswell  a4th ed  aThousand Oaks :bSAGE Publications,cc2014.  axxix, 273 p. :bill. ;c26 cm  aIncludes bibliographical references (p. 251-260) and indexes 0aSocial sciencesxMethodologyxMethodology 4aSocial sciencesxStatistical methods