Winata, H. S.; Faisal, H.; Andry, M.; Aulia, N.; Nasution, M. A.; Tambunan, I. J. Determination of Total Flavonoid Content of Ethanolic Extract of Yellow Mangosteen (Garcinia Xanthochymus) by Spectrometry Uv-Vis Method and LCMS. JPS 2023, 6, 935-950.