Naowapanich, S., B. Siritarungsri, S. Sripunvoraskul, P. Wiratchpintu, and W. Pinyopasakul. “Development of a Competency Scale for Cardiovascular Nurses at a University Hospital”. Nursing Science Journal of Thailand, vol. 33, no. 1, Mar. 2015, pp. 33-41, https://he02.tci-thaijo.org/index.php/ns/article/view/40982.