Taolin, Y., and N. Dewitanty. “Efforts To Improve Children’s Cognitive Abilities Through Playing Puzzle Activities in Group B At Kindergarten Satap Fatumuti”. Early Childhood Education Development and Studies (ECEDS), Vol. 3, no. 2, Nov. 2022, pp. 88-91, doi:10.35508/eceds.v3i2.12369.