Tài liệu tham khảo WikiPedia: Khỉ_cộc http://www.vncreatures.net/chitiet.php?page=3&loai... http://www.huegreencorridor.org/resources/DATA/GCP... http://www.iucnredlist.org/details/12548 https://species.wikimedia.org/wiki/Macaca_arctoide...