Rusli, R.K., Mahata, M.E., Yuniza, A., Zurmiati, Z., Reski, S., Hidayat, C., Hilmi, M. and Mutia, R. 2024. Optimization of solvent and extraction time on secondary metabolite content of mangosteen leaf (Garcinia mangostana L.) as a feed additive candidate on poultry. Journal of Advanced Veterinary and Animal Research. 11, 1 (Mar. 2024), 139–145.