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Sources of Law in the International and Major Legal Systems of the World
The sources of international law are very different from the sources of U.S. law (also called domestic or national law). The secondary sources of law in the international legal system resemble those in the civil law system. The chart below is useful for comparison purposes.
from Marci B. Hoffman & Robert C. Berring, International and Foreign Legal Research: a coursebook Leiden: Martinus Nijhoff Publishers, 2008. K85 .H64 2008 Reserve and 2nd ed. 2012 ebook