Orwell, George, 1903-1950
Animal farm
Sumbu, 2001
 Buku Teks
Animal diversity
by Cleveland P. Hickman, Jr. [and others]
McGraw-Hill, 2012
 Buku Teks
McFarland, David
Animal behaviour
 Buku Teks
Orwell, George, 1903-1950
Animal farm
Bentang , 2016
 Buku Teks
Animal diversity
Cleveland P. Hickman [and others]
McGraw-Hill, 2015
 Buku Teks