Sue, M. Valerie. Conducting Online Surveys / Valerie M. Sue and Lois A. Ritter. - 2nd ed. - Los Angeles, CA. : Sage, 2012. - xiv, 242 p. : ill. ; 23 cm. ISBN: 9781412992251 (pbk.) RM130.15 Subjects--Topical Terms: Social Survey--Methology.Internet survey.