Isti Fadah, Handriyono, Diana S Tobing & Istatuk BY. 2019. “STRATEGY FOR IMPROVING PERFORMANCE OF INFORMAL SECTORS BASED ON ECOWISATA IN WHITE SAND BEACH TOURISM IN SITUBONDO DISTRICT”. International Journal of Research Science and Management 6 (8):27-33. http://ijrsm.com/index.php/journal-ijrsm/article/view/241.