S. . Selviani and R. Azara, “The Effect of Age Of Cassava Tapai (Manihot esculenta) and Concentration on The Characteristics of Cassava Tapai Flour : Pengaruh Umur Tape Singkong (Manihot esculenta) dan Konsentrasi Ragi Terhadap Karakteristik Tepung Tape Singkong ”, jtfat, vol. 1, no. 02, pp. 30–37, Aug. 2021.