Case study research : design and methods / Robert K. Yin. Yin, Robert K. Case method. Social sciences Research Methodology. Social Sciences methods. Research Design. H62 .Y56 2014 300.72 23 YIC Includes bibliographical references p. 243-257 and index. New Delhi : Sage, 2014. 2014. 2014 Text xxviii, 282 p. : eng