Alip, E. M. Fifty years of Philippine progress: A study in the making of a New Nation. Journal of the Philippine National Historical Society.
Chicago-referens (17:e uppl.)Alip, Eufronio Melo. Fifty Years of Philippine Progress: A Study in the Making of a New Nation. [Manila]: Journal of the Philippine National Historical Society.
MLA-referens (9:e uppl.)Alip, Eufronio Melo. Fifty Years of Philippine Progress: A Study in the Making of a New Nation. Journal of the Philippine National Historical Society.
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