Gracela, Ira, Ermi Girsang, Ali Napiah Nasution, Jeri Yuliansyah, and Riri Virzan Putri. 2025. “Application of Clitoria Ternatea L. Flower Extract Lotion in Preventing the Decrease in Collagen and Epidermis Thickness in Wistar Rats Skin Given Ultraviolet-B Rays”. Jurnal Penelitian Pendidikan IPA 11 (3):844-53. https://doi.org/10.29303/jppipa.v11i3.10947.