“Comparative Analysis of Free Formaldehyde Determination Methods in Acne Treatment Product Samples: Perbandingan Metode Pengujian Formaldehida Bebas pada Sampel Produk Anti jerawat” (2026) Journal Pharmasci (Journal of Pharmacy and Science), 11(2), pp. 307–322. doi:10.53342/pharmasci.v11i2.598.