Harjani, C., Aditiyarini, D., & Prakasita, V. C. (2025). COMPARATIVE pH ANALYSIS: HOMEMADE COLD CLAY VERSUS COMMERCIAL CLAY FOR CHILD SAFETY. Jurnal Bioteknologi & Biosains Indonesia (JBBI), 12(2), 375–381. https://doi.org/10.55981/jbbi.2025.13507