Zweigert, K., & Kropholler, J. (1971). Sources of international uniform law: Sources du droit uniforme international. Quellen des internationalen Einheitsrechts. Sijthoff.
Chicago Style (17th ed.) CitationZweigert, Konrad, and Jan Kropholler. Sources of International Uniform Law: Sources Du Droit Uniforme International. Quellen Des Internationalen Einheitsrechts. Leiden: Sijthoff, 1971.
MLA (9th ed.) CitationZweigert, Konrad, and Jan Kropholler. Sources of International Uniform Law: Sources Du Droit Uniforme International. Quellen Des Internationalen Einheitsrechts. Sijthoff, 1971.
Warning: These citations may not always be 100% accurate.