00825nam0 22002773i 450 99627844930331620190108085157.0978-1-5063-8676-820180220d2018----||||0itac50 baengUSResearch designqualitative, quantitative, and mixed methods approachesJohn W. Creswell, J. David Creswell5. edLos Angeles [etc.]Sage2018XXV, 275 p.26 cmScienze socialiRicercheMetodoBNCF300.72CRESWELL,John W.143582CRESWELL,J. David761415ITsalbcISBD996278449303316II.5. 7525269113 LM.II.5.439931BKUMAResearch design1541626UNISA