Triana, Rizki Sevi, and Joko Pamungkas. “Drawing and Coloring Using Crayon With Gradation Technique at Kindergarten”. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, vol. 6, no. 5, July 2022, pp. 5165-70, doi:10.31004/obsesi.v6i5.2761.