Ibrahim, Ibrahim, et al. “From Nature Tourism to Ecotourism: Assessing the Ecotourism Principles Fulfillment of Tourism Natural Areas in Bangka Belitung: Dari Nature Tourism Ke Ecotourism: Menakar Keterpenuhan Prinsip-Prinsip Ecotourism Pada Kawasan Wisata Alam Di Bangka Belitung”. Society, vol. 7, no. 2, Dec. 2019, pp. 281-02, https://doi.org/10.33019/society.v7i2.111.