1. American speech-language-hearing association. Voice disorders 2023. [cited 2023 Dec 23]. Available at: https://www.asha.org/practice-portal/clinical-topics/voice-disorders.
2. School teachers vocal use, risk factors, and voice disorder prevalence: guidelines to detect teachers with current voice problems;De Alvear;Folia Phoniatr Logop,2011
3. Prevalence of voice disorders and associated risk factors in teachers and nonteachers in Iran;Seifpanahi;J Voice,2016
4. The study of vocal quality disorders among elementary school teachers in Dusit area [Master Dissertation];Sujjalak,1988
5. Prevalence and associated factors of voice disorders among school teachers in Bangkok Metropolitan Administration;Chantree;TMJ,2015