APA-viite (7. p.)
ebrary, Inc. (2003). Life in the universe: An assessment of U.S. and international programs in astrobiology. National Academies Press.
Chicago-viite (17. p.)
ebrary, Inc. Life in the Universe: An Assessment of U.S. and International Programs in Astrobiology. Washington, D.C.: National Academies Press, 2003.
MLA-viite (9. p.)
ebrary, Inc. Life in the Universe: An Assessment of U.S. and International Programs in Astrobiology. National Academies Press, 2003.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.