Macapagal, D. P. (1964). Piety and patriotism. Research and Special Projects, Malacanang Press Office.
Citace podle Chicago (17th ed.)Macapagal, Diosdado P. Piety and Patriotism. [Manila]: Research and Special Projects, Malacanang Press Office, 1964.
Citace podle MLA (9th ed.)Macapagal, Diosdado P. Piety and Patriotism. Research and Special Projects, Malacanang Press Office, 1964.
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