HIDAYATI, Nur Aini. Estimating Willingness-to-Pay Values to Improve the PDAM Clean Water in Surabaya. International Journal of Psychosocial Rehabilitation, [S. l.], v. 24, n. 7, p. 786–799, 2020. DOI: 10.61841/vm1an392. Disponível em: https://www.psychosocial.com/index.php/ijpr/article/view/9595. Acesso em: 18 feb. 2026.