Ahmad, Norhayati. “Birds of Imbak Canyon Study Centre, Imbak Canyon Conservation Area, Tongod, Sabah, Malaysia”. Journal of Tropical Biology & Conservation (JTBC) 16 (October 15, 2019): 41–60. Accessed May 5, 2024. https://jurcon.ums.edu.my/ojums/index.php/jtbc/article/view/2026.