Creel, R. E. (2001). Thinking philosophically: An introduction to critical reflection and rational dialogue. Blackwell.
Lua i Stíl Chicago (17ú heag.)Creel, Richard E. Thinking Philosophically: An Introduction to Critical Reflection and Rational Dialogue. Malden, Mass.: Blackwell, 2001.
Lua MLA (8ú heag.)Creel, Richard E. Thinking Philosophically: An Introduction to Critical Reflection and Rational Dialogue. Blackwell, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.