Haliza Ahmad Suhaimi, et al. “The Strategic Effectiveness on Implementation of Solid Waste Management at Kuala Lumpur International Airport”. Politeknik & Kolej Komuniti Journal of Social Sciences and Humanities, vol. 4, no. 1, Nov. 2019, pp. 76-84, https://app.mypolycc.edu.my/journal/PMJSSH/article/view/182.