Nugrahani, R., Andayani, Y., & Hakim, A. (2020). Antioxidant Activity of Fruit Extract Powder Beans (Phaseolus vulgaris L.) Using DPPH Method. Jurnal Penelitian Pendidikan IPA, 6(2), 194–198. https://doi.org/10.29303/jppipa.v6i2.409