Y. . Pratiwi Utami, I. Imrawati, and E. . Songga, “Effects of Exposure Methods to Differences in Material Analysis of Plant Tanin in Leaves of Psidium guajava L. According to UV-Vis Spectroscopic photometry From Tana Toraja South Sulawesi”, AMI, no. 4, pp. 68–72, Dec. 2023.