Tambunan, J., S. Aryanti, and D. H. O. Sunggu. “A CT-Scan Thorax Lung Tumor on Suspicion of Columbia Asia Hospital Medan: A CT-Scan Thorax Lung Tumor on Suspicion of Columbia Asia Hospital Medan”. Journal of Midwifery and Nursing, vol. 2, no. 1, Dec. 2019, pp. 63-70, https://iocscience.org/ejournal/index.php/JMN/article/view/405.