Cita APA (7th ed.)

230061 Bennett, J. O., Shostak, G. S., & Jakosky, B. M. (2003). Life in the universe. San Francisco, CA : Addison Wesley.

Cita Chicago (17th ed.)

230061 Bennett, Jeffrey O., G. Seth Shostak, i Bruce M. Jakosky. Life in the Universe. San Francisco, CA : Addison Wesley, 2003.

Cita MLA (9th ed.)

230061 Bennett, Jeffrey O., et al. Life in the Universe. San Francisco, CA : Addison Wesley, 2003.