คีรีรัตน์ ว. and ชาญศิลป์ ว. (2019) “Satisfaction of People toward the Services of Bangkhen Branch Waterworks Office, Metropolitan Waterworks Authority”, Thai Interdisciplinary and Sustainability Review. Bangkok, Thailand, 3(2), pp. 121–128. available at: https://so03.tci-thaijo.org/index.php/JIRGS/article/view/228216 (accessed: 11 September 2026).