Santosa, Y. , Rahman, D. , Wulan, C. , Mustari, A. (2015). 'Calculation of a Sustainable Quota Harvesting of Long-Tailed Macaque (Macaca fascicularis Raffles) in Their Natural Habitats'. World Academy of Science, Engineering and Technology, Open Science Index 104, International Journal of Agricultural and Biosystems Engineering, 9(8), 946 - 952.