Quitoy, Jhayvan Eve R., Danielle Anne C. Garcia, Rodelio F. Subade, and Louie Marie T. Eluriaga. “Estimating Tourism Losses Due to COVID-19 Pandemic: The Case of Puerto Princesa Underground River, Philippines”. Davao Research Journal 15, no. 2 (June 17, 2024): 66–77. Accessed June 26, 2024. https://davaoresearchjournal.ph/index.php/main/article/view/189.