Denzler, B. (2001). The lure of the edge: Scientific passions, religious beliefs, and the pursuit of UFOs. University of California Press.
Lua i Stíl Chicago (17ú heag.)Denzler, Brenda. The Lure of the Edge: Scientific Passions, Religious Beliefs, and the Pursuit of UFOs. Berkeley: University of California Press, 2001.
Lua MLA (9ú heag.)Denzler, Brenda. The Lure of the Edge: Scientific Passions, Religious Beliefs, and the Pursuit of UFOs. University of California Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.