Sai-ubol P, Boonwises S. Work Morale of Officers in Immigration Division 1 during COVID-19 Pandemic. rpujournal [Internet]. 2022 Aug. 25 [cited 2024 Apr. 19];8(2):249-64. Available from: https://so03.tci-thaijo.org/index.php/rpu/article/view/262985