Tambunan, S., C. Lubis, and H. Siregar. “Studies On Amoebicides At The Child Health Department Dr. Pirngadi Hospital, Medan (1969 - 1979)”. Paediatrica Indonesiana, Vol. 24, no. 5-6, Aug. 2018, pp. 116-24, https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/1925.