Gripaldo, R. M. (1997). Manuel L. Quezon's political philosophy. Sophia.
Lua i Stíl Chicago (17ú heag.)Gripaldo, Rolando M. "Manuel L. Quezon's Political Philosophy." Sophia 1997.
Lua MLA (9ú heag.)Gripaldo, Rolando M. "Manuel L. Quezon's Political Philosophy." Sophia, 1997.
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