Siffana, D. A., and E. Destiana. “The Increase in the Ability to Speak through the Katumbar Media in Children Aged 3-4 Years in Kindergarten: Peningkatan Kemampuan Berbicara Melalui Media Katumbar Pada Anak Usia 3-4 Tahun Di KB”. Academia Open, vol. 6, June 2022, p. 10.21070/acopen.6.2022.2541, doi:10.21070/acopen.6.2022.2541.