Hanin Shohwati Muthi’ah, Ghaida Azzahra, Hana Rahmawati, and Nailah Husnayain. 2025. “Calculation of SPF Value and Root Analysis on Determining Vitamin C Levels in Sunscreens Using the Fishbone Diagram”. Solo International Collaboration and Publication of Social Sciences and Humanities 3 (02):237-46. https://doi.org/10.61455/sicopus.v3i02.253.