Orawongphaisal, S. ., C. . Saneha, A. . Poungkaew, and K. . Musikatavorn. “The Effect of Concreate-Objective Informational Support Program via Smartphone Application on Anxiety Among Relatives of Urgent Patients in Emergency Room”. Nursing Science Journal of Thailand, vol. 41, no. 3, June 2023, pp. 34-49, https://he02.tci-thaijo.org/index.php/ns/article/view/255394.