Schäfer, K. A. (2010). Application of mandatory rules in the private international law of contracts: A critical analysis of approaches in selected continental and common law jurisdictions, with a view to the development of South African law. Peter Lang.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Schäfer, Kerstin Ann-Susann. Application of Mandatory Rules in the Private International Law of Contracts: A Critical Analysis of Approaches in Selected Continental and Common Law Jurisdictions, with a View to the Development of South African Law. Frankfurt am Main ; New York: Peter Lang, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Schäfer, Kerstin Ann-Susann. Application of Mandatory Rules in the Private International Law of Contracts: A Critical Analysis of Approaches in Selected Continental and Common Law Jurisdictions, with a View to the Development of South African Law. Peter Lang, 2010.