Creswell, John W.
Qualitative inquiry and research design : choosing among five approaches / John W. Creswell. - Third - Los Angeles : SAGE Publications, c2009 - xxi, 448 p. : ill. (some dol.) ; 23 cm.
Qualitative inquiry and research design : choosing among five approaches / John W. Creswell. - Third - Los Angeles : SAGE Publications, c2009 - xxi, 448 p. : ill. (some dol.) ; 23 cm.