230061 Bennett, J. O., Shostak, G. S., & Jakosky, B. M. (2003). Life in the universe. San Francisco, CA : Addison Wesley.
Lua i Stíl Chicago (17ú heag.)230061 Bennett, Jeffrey O., G. Seth Shostak, agus Bruce M. Jakosky. Life in the Universe. San Francisco, CA : Addison Wesley, 2003.
Lua MLA (9ú heag.)230061 Bennett, Jeffrey O., et al. Life in the Universe. San Francisco, CA : Addison Wesley, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.