Creswell,JohnW Research design: qualitative, quantitative, and mixed method approaches / John W Creswell - 2nded - ThousandOaks,CA:SagePublications,c2003 - xxvi,246p:ill;24cm ISBN: 0761924418 0761924426(pbk) Subjects--Topical Terms: Socialsciences--Research--Methodology Socialsciences--Statisticalmethods Dewey Class. No.: 30072CRE