Subade, Rodelio F, et al. “Assessing Willingness to Pay for Conservation of Endangered Species and Habitats Using Two Payment Vehicles in Contingent Valuation Survey: A Case for Northwest Panay Peninsula, Philippines”. Silliman Journal, vol. 59, no. 1, Oct. 2022, https://su-journal.su.edu.ph/index.php/sj/article/view/45.