Sukmawati Tansil Tan, Ernawati Ernawati, Alexander Halim Santoso, Yohanes Firmansyah, Anggita Tamaro, and William Gilbert Satyanegara, “Community Service Activities – Education And Screening For Damage Of Facial Skin Hydration Caused By Sun Exposure In Adolescent Boys ”, sejahtera, vol. 2, no. 2, pp. 120–130, Apr. 2023.