Halley, J. Woods
How likely is extraterrestrial life?
Springer, 2012
 eBooks
Clancy, Paul
Looking for life, searching the solar system
Cambridge University Press, 2005
 Buku Teks SO
Life on earth
by Edwad O. Wilson ... [et.al.]
Sinauer Associates, 1973
 Buku Teks SO
Jones, H. Spencer
Life on other worlds
Macmillan, 1956
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Achenbach, Joel
Captured by aliens: the search for life and truth in a very large universe
Simon & Schuster, 1999
 Buku Teks