SinagaMega W. A., and Burhanuddin Masyud. 2018. “Space Utiliztion and Behaviours of Sumatran Slow Loris (Nycticebus Coucang Boddaert, 1785) in Pematang Siantar Zoo”. Media Konservasi 22 (3), 304-11. https://doi.org/10.29244/medkon.22.3.304-311.