Yin, Robert Kuo-Zuir Case study research : design and methods / Robert K. Yin - 2nd ed. - Thousand Oaks, California : Sage, 1994. - xvii, 171 p. : ill. ; 23 cm. ISBN: 0803956630 Subjects--Topical Terms: Case methodSocial sciences--Research--Methodology Dewey Class. No.: 300.722 YI CA