Gripaldo, R. M. (2009). Filipino philosophy: Traditional approach (3rd edition.). C & E Publishing Council for Research in Values and Philosophy.
Lua i Stíl Chicago (17ú heag.)Gripaldo, Rolando M. Filipino Philosophy: Traditional Approach. 3rd edition. Manila, Washington, D.C: C & E Publishing Council for Research in Values and Philosophy, 2009.
Lua MLA (9ú heag.)Gripaldo, Rolando M. Filipino Philosophy: Traditional Approach. 3rd edition. C & E Publishing Council for Research in Values and Philosophy, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.