Reihe Sozialwissenschaftliche ForschungsmethodenHans-Gerd Ridder × Case Study ResearchApproaches, Methods, Contribution to TheoryHans-Gerd RidderEdition Rainer HamppeBook2020 Case Study ResearchApproaches, Methods, Contribution to TheoryHans-Gerd RidderEdition Rainer HamppSoftcover2019 Case Study ResearchApproaches, Methods, Contribution to TheoryHans-Gerd RidderEdition Rainer HamppeBook2016 Case Study ResearchApproaches, Methods, Contribution to TheoryHans-Gerd RidderEdition Rainer HamppSoftcover2016