นามิ่ง ศ., ตรีเดช ป., ศิริ ส., and ตรีเดช ศ. “Average Time Analysis of Direct Nursing Activities of Cardiovascular and Thoracic Surgery Patients: A Case Study of The Cardiovascular and Thoracic Surgery Intensive Care Unit of Ramathibodi Hospital”. Journal of Phrapokklao Nursing College, Chanthaburi, vol. 28, no. 2, Apr. 2018, pp. 104-15, https://he01.tci-thaijo.org/index.php/pnc/article/view/118116.