Khairiyah S, Sinaga SM, Putra ED. Determination Of Vitamin C And Antioxidant Activity In Fresh Red Guava (Psidium Guajava L.) And Red Guava Commercial Fruit Juices. IJSTM [Internet]. 2022 Jul. 17 [cited 2026 Feb. 11];3(4):880-3. Available from: https://ijstm.inarah.co.id/index.php/ijstm/article/view/543