M. Damiati, R. Rufi'i, and R. Danu, “The Elaboration of Tangram Media with a Scientific Approach to Social Studies Learning in Elementary School”, Int J Innov Educ Res, vol. 6, no. 12, pp. 269–273, Dec. 2018, doi: 10.31686/ijier.vol6.iss12.1276.