โรจนพิทยากร วิวัฒน์. “Thailand Launches the Phuket Sandbox Model to Welcome Foreigners Beginning on the First of July”. Journal of Health Science of Thailand 30, no. Supplement 1 (June 30, 2021): S1-S2. Accessed July 3, 2024. https://thaidj.org/index.php/JHS/article/view/10260.