Casambre, A. L. C. (2006). Medieval political thought: St. Augustine and St. Thomas Aquinas. U.P. Diliman Interactive Learning Center.
Lua i Stíl Chicago (17ú heag.)Casambre, Athena Lydia Cera. Medieval Political Thought: St. Augustine and St. Thomas Aquinas. Quezon City: U.P. Diliman Interactive Learning Center, 2006.
Lua MLA (9ú heag.)Casambre, Athena Lydia Cera. Medieval Political Thought: St. Augustine and St. Thomas Aquinas. U.P. Diliman Interactive Learning Center, 2006.
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