Kurniawati , C.R., Umar , R.N. and Sapri, S. 2026. Formulation and Physical Characterization of Nanopropolis (Trigona sp.) Hydrogel Acne Patch from Balikpapan. Journal of Pharmaceutical and Sciences. 9, 3 (Sep. 2026), 3073–3081. DOI:https://doi.org/10.36490/journal-jps.com.v9i3.1759.