Ratnaningtyas, Wahyunita Desi, Sawitri Sawitri, Dwi Murtiastutik, and Afif Nurul Hidayati. 2020. “The Difference of Serum Vitamin E Levels Between Adolescent Patients With and Without Acne Vulgaris”. Berkala Ilmu Kesehatan Kulit Dan Kelamin 32 (1):40-47. https://doi.org/10.20473/bikk.V32.1.2020.40-47.