Gelissen, John P. T. M. Qualitative research methods / by John Gelissen. - 2nd ed. - Thousand Oaks, CA : SAGE Publications, c2012. - 137 p ; 24 cm. ISBN: 9781446267240 (pbk) : 650.00 Birr LCCN: 2012943819 Dewey Class. No.: 001.42 Gel 2012