Bahar, Yadela, et al. “Penentuan Nilai Sun Protection Factor (SPF) Ekstrak Etanol Daun Jeruju (Acanthus Ilicifolius L.) Secara In Vitro”. Indonesian Journal of Pharma Science, vol. 3, no. 2, June 2022, pp. 91-96, doi:10.22437/ijps.v3i2.15975.