Keosian, John
Origin of life
Reinhold Publishing Corporation, 1964
 Buku Teks
Tobin, Allan J.
Asking about life, vol.3
Harcourt College Publishing, 2001
 Buku Teks
LIfe: the science of biology
by William K. Purves ... [et al.]
Salt lake City Sinauer Associates , 1998
 Buku Teks
Starr, Cecie
Biology : the unity and diversity of life
Wadsworth, 1998
 Buku Teks
Purves, William K.
Life : the science of biology
The Mona GrOup LLC, 1998
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