Munusami C, Othman J, Mohamad Ismail S, Siwar C. ESTIMATION OF WILLINGNESS TO PAY FOR WASTEWATER TREATMENT SERVICE IMPROVEMENT IN MALAYSIA. IJBS [Internet]. 2017 Nov. 20 [cited 2024 Dec. 22];17(2). Available from: https://publisher.unimas.my/ojs/index.php/IJBS/article/view/530