Leuffen, D. <., Rittberger, B. <., & Schimmelfennig, F. <. Integration and differentiation in the European Union: Theory and policies (2nd edition.). Cham, Switzerland: Palgrave Macmillan.
Chicago Style CitationLeuffen, Dirk <<[VerfasserIn]>>, Berthold <<[VerfasserIn]>> Rittberger, and Frank <<[VerfasserIn]>> Schimmelfennig. Integration and Differentiation in the European Union: Theory and Policies. 2nd edition. Cham, Switzerland: Palgrave Macmillan.
MLA CitationLeuffen, Dirk <<[VerfasserIn]>>, Berthold <<[VerfasserIn]>> Rittberger, and Frank <<[VerfasserIn]>> Schimmelfennig. Integration and Differentiation in the European Union: Theory and Policies. 2nd edition. Cham, Switzerland: Palgrave Macmillan.
Warning: These citations may not always be 100% accurate.