Sayuti, N. A. “Formulasi Dan Uji Stabilitas Fisik Sediaan Gel Ekstrak Daun Ketepeng Cina (Cassia Alata L.)”. Jurnal Kefarmasian Indonesia, vol. 5, no. 2, Aug. 2015, pp. 74-82, https://mail.jkefarind.com/index.php/jki/article/view/3500.