LEVI, W. (1991). Contemporary International Law A Concise Introduction Werner Levi. Westview.
Lua i Stíl Chicago (17ú heag.)LEVI, Werner. Contemporary International Law A Concise Introduction Werner Levi. Westview, 1991.
Lua MLA (8ú heag.)LEVI, Werner. Contemporary International Law A Concise Introduction Werner Levi. Westview, 1991.
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