Fitriani A. Making Purple Sweet Potato Tape Flour (Ipoema batatas var.Ayamurasaki): A Study Of FermentationTime and Yeast Concentration: Pembuatan Tepung Tape Ubi Jalar Ungu (Ipomoea batatas var. Ayamurasaki) : Kajian Lama Fermentasi dan Konsentrasi Ragi. jtfat [Internet]. 2021 Aug. 10 [cited 2025 Jul. 31];1(02):22-9. Available from: https://jtfat.umsida.ac.id/index.php/jtfat/article/view/1555