Prathanee, B., Pumnum, T., Ooppanasak, N., Vatanasapt, P., & Punyaek, N. (2021). Comprehensive esophageal speech training for laryngectomees: Substantial benefits. Journal of Associated Medical Sciences, 54(2), 1–7. retrieved from https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/241065