A. Irawan, T. A. Putra, and C. T. Ulwia, “Uji Fitokimia Metabolit Sekunder Daun Ubi Jalar Ungu (Ipomoea batatas (L.) Lamk)”, Borneo J of Pharmascientech, vol. 6, no. 2, pp. 71-74, Oct. 2022.