Ishartani, Dwi, et al. “PEMURNIAN PROTEASE DARI BUAH DAN DAUN MENGKUDU (Morinda Citrifolia L.) [Purification of Proteases from Fruits and Leaves of Noni (Morinda Citrifolia L.)]”. Jurnal Teknologi Dan Industri Pangan, vol. 22, no. 1, June 2011, p. 78, https://journal.ipb.ac.id/jtip/article/view/3400.