Pullnuch , S., B. Chitpakdee, and K. . Abhicharttibutra. “Development of a Registered Nurse Competency Framework, Cardiothoracic Intensive Care Unit, Buddhachinaraj Phitsanulok Hospital”. Nursing Journal CMU, vol. 47, no. 3, Sept. 2020, pp. 418-30, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/245787.