Ibrahim, I. et al. 2019. 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. 7, 2 (Dec. 2019), 281–302. DOI:https://doi.org/10.33019/society.v7i2.111.