Irfan, Irfan, Nurhayati Nurhayati, and Asmawati Asmawati. 2022. “Kajian Penambahan Ubi Jalar Ungu (Ipomoea Batatas Blackie) Terhadap Sifat Kimia Dan Sensoris Yoghurt Susu Kedelai: The Fortification of Purple Sweet Potato (Ipomoea Batatas Blackie) on Chemical and Sensory Properties of Soygurt”. Pro Food 7 (2):68-75. https://doi.org/10.29303/profood.v7i2.209.