Hayyin, Syarah. “The Preference Level of Tempeh Snack Bar and Purple Sweet Potato Flour With Addition of Raisins”. Jurnal Gizi dan Kesehatan Nusantara 3, no. 1 (March 20, 2023): 186–192. Accessed June 23, 2025. https://ejournal.unesa.ac.id/index.php/GIZIUNESA/article/view/50349.