Ramadhan, La Ode Ahmad Nur, et al. “Green Preparation of Cu Nanoparticles With Bioreductor of Red Dragon Fruit Peel Extract: Visible Spectroscopy Properties”. Journal of Tropical Pharmacy and Chemistry, vol. 8, no. 1, June 2024, pp. 93-100, doi:10.25026/jtpc.v8i1.633.