Surya, A., and D. Febrianti. “Antioxidant Activity Test of Methanol Extract of Lime Peel (Citrus Aurantifolia) With DPPH Method (1,1-Difenil-2-Pikrilhidrail)”. Jurnal Ilmu Kesehatan Abdurrab, Vol. 1, no. 1, June 2023, pp. 16-22, http://jurnal.univrab.ac.id/index.php/jika/article/view/3551.