Stewart, David W. Focus groups: theory and practice / David W. Stewart, Prem N. Shamdasani. - 3rd ed. - New Delhi: Sage, 2015. - xix, 202 p. - Applied social research methods series; 20 . ISBN: 9781452270982 Subjects--Topical Terms: RESSocial science- ResearchFocus groupSocial group Dewey Class. No.: 300.723 / STE-F