Muzos, Steven J.
Study guide to accompany wallace biology: the world of life / Steven J. Muzos
Harper Collins College, 1992
 Buku Teks
Life: study guide to accompany
Ricki Lewis ... [and others]
McGraw-HIll, 2002
 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
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Starr, Cecie
Biology : the unity and diversity of life
Wadsworth, 1998
 Buku Teks