Sugianto, M., Z. Abidin, U. Purwono, y J. Siregar. «Making a Better World from the Children’s Perspective: How to Make Compassion Contagious». Opción, Vol. 35, octubre de 2019, pp. 1102-21, https://www.produccioncientificaluz.org/index.php/opcion/article/view/32278.