Silverman, David. Qualitative research - 3rd ed. - New Delhi Sage 2011 - 450p. Observation --Texts --Interviews and focus groups --talk --Visual data --Qualitative data analysis ISBN: 9788132110385 Subjects--Chronological Terms: Research Subjects--Topical Terms: Research methodology Dewey Class. No.: 001.4 / SIL/QUA