Norden, Norhanani Aina, Nurhidayah Hamzah, Nor Azliza Akbar, and Nor Amani Filzah Mohd Kamil. “A Study of Outdoor Concentrations of Particulate Matter (PM2.5) on Different Floors of a University Building”. Journal of Advancement in Environmental Solution and Resource Recovery 2, no. 2 (December 28, 2022): 12–18. Accessed August 12, 2026. https://journal.uthm.edu.my/index.php/jaesrr/article/view/12768.