Sabri, T., S. Soeharto, and I. Kurniadi. “Development of Interactive Teaching Materials Using Whiteboard Animation for Civic Learning in Elementary School”. EDUCATIO : Journal of Education, Vol. 4, no. 2, Nov. 2019, pp. 125-38, https://www.ejournal.staimnglawak.ac.id/index.php/educatio/article/view/178.