Nurzaidah Putri Dalimunthe, Hady Sukadi Alikodra, Entang Iskandar, Sri Suci Utami Atmoko, & Rahmad Lingga. (2021). Visitor’s Perception About Orangutan Conservation In Indonesian Zoos . International Journal of Science, Technology & Management, 2(6), 2209-2217. https://doi.org/10.46729/ijstm.v2i6.395