1. WHO, Addressing The Rising Prevalence of Hearing Loss; World Health Organization, No. 02. Geneva, Switzeland, 2018.
2. DOSH, “Annual Report 2019, Department of Occupational Safety and Health,” Putrajaya, 2019.
3. Prevalence of Hearing Loss and Hearing Impairment among Small and Medium Enterprise Workers in Selangor, Malaysia
4. Do hearing protectors protect hearing?
5. Better Health Channel, “Hearing loss-how it affects people-Better Health Channel.” 2020.