Ali, Fandyka Yufriza, et al. “Pengaruh Penambahan Ampas Kopi Terhadap Uji Organoleptik Cookies Berbahan Dasar Tepung Ubi Jalar Ungu : The Effect of Spent Coffee Grounds Addition on the Organoleptic Test of Cookies Made from Purple Sweet Potato Flour”. Jurnal Ilmiah Pangan Halal, vol. 7, no. 3, Nov. 2025, pp. 349-5, doi:10.30997/jiph.v7i3.21306.