Willis, H. P. (1976). Our Philippine problem: A study of American colonial policy [microform]. Photoduplication Service, University of the Philippines Library.
Citace podle Chicago (17th ed.)Willis, Henry Parker. Our Philippine Problem: A Study of American Colonial Policy [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.
Citace podle MLA (9th ed.)Willis, Henry Parker. Our Philippine Problem: A Study of American Colonial Policy [microform]. Photoduplication Service, University of the Philippines Library, 1976.
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