Sharp, David
Animal days : animals from the hot lands
Bay Books, 1984
 Buku Referensi
Sharp, David
Animal days : animals from the cold lands
Bay Books, 1984
 Buku Referensi
Sharp, David
Animal days : animals from the rivers and oceans
Bay Books, 1984
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Breeding and improvement of farm animals
Victor Arthur Rice...[et al.]
McGraw-Hill, 1957
 Buku Teks
Maerlant, Jacob van
Boek der natuur
EM. Querido's Uitgeverij B.V, 1989
 Buku Teks