^Junaidi Payne; Charles M. Francis (2005). A Field Guide to the MAMMALS of BORNEO (4th ed.). Kota Kinabalu: The Sabah Society. pp. 142, 299-300
^Wilson, D.E., Reeder, D.M. (eds.) (2005) Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed), Johns Hopkins University Press online