Enhancement of Students’ Knowledge Regarding Appropriate Sunscreen Selection Based on SPF Variations and Skin Type Characteristics at Wirahusada Health Vocational School, Medan. JPK [Internet]. 2026 Jul. 1 [cited 2026 Jul. 6];6(1):235-40. Available from: https://ejournal.medistra.ac.id/index.php/JPK/article/view/3749