Bernard, H Russell. Social research methods : qualitative and quantitative approaches / H Russell Bernard. - 2nd ed / . - London : Sage Publications , 2013. - xxxiii,789p. : ills., figs., tables etc. ; 27cm . Includes bibliographical referrences and index ISBN: 9781412978545 USD119.00 Subjects--Index Terms: SOCIAL SCIENCE-RESEARCH-METHODOLOGY Dewey Class. No.: 300.72 / BER/S