Trismayanti, Euis, et al. “Implementation of The ‘Little Detective’: Structured Stimulation Programme to Improve Problem Solving Skills in Early Chilhood”. Edu Happiness: Jurnal Ilmiah Perkembangan Anak Usia Dini, vol. 5, no. 2, July 2026, pp. 238-4, doi:10.62515/eduhappiness.v5i2.1457.