Adib, Moh, Sunarsieh, and Salbiah Kastari. “EFFECT OF EXHAUST FAN TO MICROORGANISM CONCENTRATION IN THE AIR-CONDITIONED ROOM”. Malaysian Journal of Public Health Medicine 20, no. 2 (October 1, 2020): 242-246. Accessed August 2, 2021. https://mjphm.org/index.php/mjphm/article/view/445.