Ulyarti, Ulyarti, et al. “Yam Starch and Chitosan-Based Bioplastics to Improve Shelf Life of Pempek”. Jurnal Penelitian Pendidikan IPA, vol. 9, no. 8, Aug. 2023, pp. 6174-80, doi:10.29303/jppipa.v9i8.3163.