Lumbantobing, R., M. Napitupulu, and M. R. Jura. “Analysis of Cyanide Acid Content in Cassava (Manihot Esculenta) Based on Storage Time”. Jurnal Akademika Kimia, vol. 8, no. 3, Aug. 2019, pp. 180-3, doi:10.22487/j24775185.2019.v8.i3.pp180-183.