Villarroel, F. (1964). Apolinario Mabini: His birth date and student years. National Historical Institute.
Chicago-referens (17:e uppl.)Villarroel, Fidel. Apolinario Mabini: His Birth Date and Student Years. Manila: National Historical Institute, 1964.
MLA-referens (9:e uppl.)Villarroel, Fidel. Apolinario Mabini: His Birth Date and Student Years. National Historical Institute, 1964.
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