Ngupimai, chutima, P. Singchungchai, and N. Pathumarak. “Cost Analysis of Nursing Service Management Activities for Pediatric Patients With Respiratory Disease at Outpatient Department in a Private Hospital”. Thai Journal of Cardio-Thoracic Nursing, vol. 32, no. 2, Mar. 2022, pp. 161-73, https://he02.tci-thaijo.org/index.php/journalthaicvtnurse/article/view/246518.