HAMUNA, Baigo, 		RUMAHORBO, Basa, 		KEILUHU, Henderina, AND 		ALIANTO, ALIANTO.
" Willingness to Pay for Existence Value of Mangrove Ecosystem in Youtefa Bay, Jayapura, Indonesia" <em>Journal of Environmental Management and Tourism</em> [Online], Volume 9 Number 5 (28 December 2018)