* C. Michael Hogan (2008) Barbary Macaque: Macaca sylvanus, GlobalTwitcher.com* Abigail Hole, Michael Grosberg and Daniel Robinson.
==References=====Notes======Sources===* C. Michael Hogan (2008) Barbary Macaque: Macaca sylvanus, GlobalTwitcher.com* Abigail Hole, Michael Grosberg and Daniel Robinson.