Case study research :
Yin, Robert K.
Case study research : design and methods / Robert K. Yin. - 5th ed. - Los Angeles : SAGE, 2014. - xxviii, 282p. : ill. ; 24cm.
Case study research : design and methods / Robert K. Yin. - 5th ed. - Los Angeles : SAGE, 2014. - xxviii, 282p. : ill. ; 24cm.