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Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus Mark D. White. Superman and Philosophy: What Would the Man of Steel Do? Chichester, West Sussex, U.K.: Wiley-Blackwell, 2013.
Lua MLA (9ú heag.)ebrary, Inc, agus Mark D. White. Superman and Philosophy: What Would the Man of Steel Do? Wiley-Blackwell, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.