Schall. The Universe We Think In. The Catholic University of America Press.
Lua i Stíl Chicago (17ú heag.)Schall. The Universe We Think In. The Catholic University of America Press.
Lua MLA (9ú heag.)Schall. The Universe We Think In. The Catholic University of America Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.