Bull, H. (1977). The anarchical society: A study of order in world politics. Columbia University.
Tohutoru Kātū Chicago (17th ed.)Bull, Hedley. The Anarchical Society: A Study of Order in World Politics. Nueva York: Columbia University, 1977.
Tohutoro MLA (9th ed.)Bull, Hedley. The Anarchical Society: A Study of Order in World Politics. Columbia University, 1977.
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