Policharpus Raja Peta. “Strategi Pengembangan Ecotourism Pulau Derawan Kabupaten Berau Kaltim”. EDUTOURISM Journal Of Tourism Research 1, no. 01 (1): 35-45. Accessed March 29, 2024. https://ejurnal.polnes.ac.id/index.php/edutourism/article/view/153.