Izati Rasli, Nur Baitul, and Nor Azam Ramli. “Indoor Chemical Air Contaminants in Main Prayer Hall During Jumaat Prayer in Mosques With Different Mechanical Ventilation”. International Journal of Integrated Engineering, vol. 11, no. 1, May 2019, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/4279.