Creswell, John W. Qualitative inquiry and research design : choosing among five traditions / John W. Creswell. - Thousand Oaks, Calif. : Sage Publications, c1998. - xv, 403 p. : ill. ; 24 cm. ISBN: 0761901434 (cloth : acidfree paper) 0761901442 (pbk. : acidfree paper) Dewey Class. No.: 300/.72