https://dispendik.situbondokab.go.id/berita/ https://vta.kemenhub.go.id/assets/
Utami, Detta, Agung Sri Sulistyawati, & Irma Rahyuda. " Implementasi corporate social responsibility di four points by sheraton surabaya." Jurnal Kepariwisataan dan Hospitalitas [Online], 9.1 (2025): 156-173. Web. 28 Mar. 2026