Rahmah Kurnia Ramdan, S., and R. Lestari. “Determination of Anthocyanin Content of Purple Sweet Potato (Ipomea Batatas L) Extract Using the Differential PH Method”. JURNAL KESEHATAN STIKes MUHAMMADIYAH CIAMIS, vol. 10, no. 2, Oct. 2023, pp. 65-70, doi:10.52221/jurkes.v10i2.371.