Nowak, Ronald M.
Walker's primates of the world
The Johns Hopkins University Press, 1999
 Buku Referensi
Scheele, William E.
Prehistoric man and the primates
World Publishing, 1957
 Buku Teks
Malayan forest primates: ten years study in tropical rain forest / edited by David J. Charles
Plenum Press , 1980
 Buku Teks