00863nam a2200241 i 4500991003480239707536080415s2003 xxu|||||| 0|| ||eng d9781412965576b13700868-39ule_insteng300.7222Creswell, John W.143582Research design :qualitative, quantitative and mixed methods approaches /John W. Creswell3rd ed.Thousand Oaks :Sage,c2009xxviii, 260 p. ;24 cmScienze socialiRicercheMetodo.b1370086804-11-0818-03-08991003480239707536LE018 300 CRE01.0112018000000621le018pE49.00-no 00000.i1487099x04-11-08Research design509802UNISALENTOle01818-03-08ma -engxxu00