The Encyclopaedia of animal behaviour and biology
edited by Peter Slater and R. McNeill Alexander
Grolier International, 1986
 Buku Referensi
Pandey, B.N.
Ecology and animal behaviour; Vol. 4
Tata McGraw-Hill, 2012
 Buku Teks
McFarland, David
Animal behaviour : psychobiology, etnology, and evolution
Longman, 1993
 Buku Teks
Orwell, George, 1903-1950
Animal farm
Sumbu, 2001
 Buku Teks
Animal diversity
by Cleveland P. Hickman, Jr. [and others]
McGraw-Hill, 2012
 Buku Teks