APA

Arangio-Ruiz Gaetano,, . (1979). The United Nation's declaration on friendly relations and the system of the sources of international law. The Netherlands: Sijthoff & Noordhoff.

Chicago

Arangio-Ruiz Gaetano,, . 1979. The United Nation's declaration on friendly relations and the system of the sources of international law. The Netherlands: Sijthoff & Noordhoff.

Harvard

Arangio-Ruiz Gaetano,, . (1979). The United Nation's declaration on friendly relations and the system of the sources of international law. The Netherlands: Sijthoff & Noordhoff.

MLA

Arangio-Ruiz Gaetano,, . The United Nation's declaration on friendly relations and the system of the sources of international law. The Netherlands: Sijthoff & Noordhoff. 1979.