Stewart, David W. Focus groups : theory and practice / David W. Stewart, Prem N. Shamdasani, Dennis W. Rook. - 2nd ed. - Thousand Oaks : SAGE Publications, c2007. - xii, 188 p. : ill. ; 22 cm. - Applied social research methods series ; v. 20 . ISBN: 0761925821 (cloth : alk. paper) 076192583X (pbk. : alk. paper) LCCN: 2006009180 Subjects--Topical Terms: Focus groups.Social sciences--Research--Methodology.Social groups. LC Class. No.: H61.28 / .S74 2007 Dewey Class. No.: 300.72/3