Yee, Kiew Sin, et al. “Knowledge, Perception and Practice of Malaysian Residents on Covid-19 During the Period of the Conditional Movement Control Order”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 54, no. 5, Dec. 2020, pp. 126-37, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12129.