Irwan Bempah, Syamsu Qamar Badu, and Bambang Suharto. “Dynamics Analysis Model Of Nature Tourism System Development In Bogani Nani Wartabone National Park Of Gorontalo Province”. Jurnal Manajemen, vol. 22, no. 2, June 2018, pp. 251-63, doi:10.24912/jm.v22i2.362.