Life: study guide to accompany
Ricki Lewis ... [and others]
McGraw-HIll, 2002
 Buku Teks
Wallace, Robert A.
Biology : the world of life
Harper Collins, 1992
 Buku Teks
Krogh, David
Biology : a guide to the natural world
Pearson, 2009
 Buku Teks
Pauli, Wolfgang F.
The world of life : a general biology / Wolfgang F. Pauli
Houghton Miffiln, 1949
 Buku Teks
Bernstein, Ruth
Biology : the study of life
Harcourt Brace Jovanovich, 1982
 Buku Teks