Nova Zairina Lubis, Hening Yumi Wardoyo Putri. Level of Knowledge among Medical Student Regarding The Role of Vitamin C For Skin Health in Universitas Sumatera Utara. Sumat. Med. J. [Internet]. 2022Nov.10 [cited 2024Nov.16];5(1). Available from: https://talenta.usu.ac.id/smj/article/view/6514