https://dispendik.situbondokab.go.id/berita/ https://vta.kemenhub.go.id/assets/
Utami, Detta, Sulistyawati, Agung Sri, AND Rahyuda, Irma. " Implementasi corporate social responsibility di four points by sheraton surabaya" Jurnal Kepariwisataan dan Hospitalitas [Online], Volume 9 Number 1 (16 May 2025)