F. Nasution, Z. Arifin, and A. Sutjipto, “Acute Non Lymphoblastic Leukemia in the Department of Child Health School of Medicine, University of North Sumatera/ Dr. Pirngadi Hospital Medan (1983-1988): A Preliminary Study”, PI, vol. 31, no. 9-10, pp. 268-72, Feb. 2019.