Yamaqupta, N. ., N. . Pringviriya, and C. . Kanchit. “Personal Factors and Service Quality Affecting Household Customers’ Positive and Negative Perspectives of Hatyai Provincial Waterworks Authority, Songkhla Province”. Parichart Journal, vol. 34, no. 1, Apr. 2021, pp. 59-75, https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/241396.