Singgalen, Yerik Afrianto. “Mangrove Forest Utilization for Sustainable Livelihood through Community-Based Ecotourism in Kao Village of North Halmahera District”. Jurnal Manajemen Hutan Tropika, vol. 26, no. 2, Aug. 2020, p. 155, https://doi.org/10.7226/jtfm.26.2.155.