Keosian,John
Origin of life/John Keosian
Reinhold Publishing Corporation, 1964
 Buku Teks
Branley, Franklyn M.
Science horizon : The world of life / Franklyn M. Branley, Milton O. Pella, and John Urban
Ginn and Company, 1965
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Tobin, Allan J.
Asking about life, vol.3
Harcourt College Publishing, 2001
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LIfe: the science of biology
by William K. Purves ... [et al.]
Salt lake City Sinauer Associates , 1998
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Starr, Cecie
Biology : the unity and diversity of life
Wadsworth, 1998
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