“A CASE STUDY ON RANHILL WATER SERVICES AND SYARIKAT AIR NEGERI SEMBILAN IN COMBATING THE NON-REVENUE WATER PROBLEM IN JOHOR AND NEGERI SEMBILAN”, jgd, vol. 17, no. 1, Jan. 2021, Accessed: Nov. 29, 2025. [Online]. Available: https://educationmalaysia.co.uk/index.php/jgd/article/view/17331