Michael, Michael. “The Relationship Between Knowledge and Perception of Patient Delivery Nurses About The Hazards of X-Ray Radiation In The Radiology Installation of The University Of North Sumatera Hospital”. International Journal of Economic, Technology and Social Sciences (Injects) 2, no. 2 (October 30, 2021): 661–666. Accessed July 9, 2025. https://jurnal.ceredindonesia.or.id/index.php/injects/article/view/1075.