Yamaqupta, Narueban, Nuchsara Pringviriya, and Chanatip Kanchit. “Personal Factors and Service Quality Affecting Household Customers’ Positive and Negative Perspectives of Hatyai Provincial Waterworks Authority, Songkhla Province”. Parichart Journal 34, no. 1 (April 8, 2021): 59–75. accessed September 12, 2026. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/241396.