Hanin Shohwati Muthi’ah, Ghaida Azzahra, Hana Rahmawati, Nailah Husnayain. Calculation of SPF Value and Root Analysis on Determining Vitamin C Levels in Sunscreens Using the Fishbone Diagram. SICOPUS [Internet]. 2025 Apr. 22 [cited 2026 May 25];3(02):237-46. Available from: https://journal.walideminstitute.com/index.php/sicopus/article/view/253