Sandbox:Shameera
- ↑ Kost KM, Sataloff RT (May 2018). "Voice Disorders in the Elderly". Clin Geriatr Med. 34 (2): 191–203. doi:10.1016/j.cger.2018.01.010. PMID 29661332.
- ↑ Byeon, Haewon (2019). "The Risk Factors Related to Voice Disorder in Teachers: A Systematic Review and Meta-Analysis". International Journal of Environmental Research and Public Health. 16 (19): 3675. doi:10.3390/ijerph16193675. ISSN 1660-4601.