Rahmawati, Dewi, et al. “Characterization and Stability Test of Facial Spray Preparation of Neem Leaf Extract (Azadirachta Indica A. Juss) As an Anti-Acne”. Jurnal Biologi Tropis, vol. 24, no. 2, June 2024, pp. 570-8, doi:10.29303/jbt.v24i2.6825.