Indriyana, Wida M., et al. “The Effect of Noni (Morinda Citrifolia) Extract Gel on Collagen Density and Expression of p53 Protein in Rats Exposed to UVB”. Tropical Journal of Natural Product Research (TJNPR), vol. 9, no. 1, Jan. 2025, pp. 204-8, https://doi.org/10.26538/tjnpr/v9i1.30.