Agpalo, R. E. (1978). Models of political systems and the Philippines. University of the Philippines Press.
Chicago-referens (17:e uppl.)Agpalo, Remigio Escalona. Models of Political Systems and the Philippines. Quezon City: University of the Philippines Press, 1978.
MLA-referens (9:e uppl.)Agpalo, Remigio Escalona. Models of Political Systems and the Philippines. University of the Philippines Press, 1978.
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