The Effect of Additional Spirulina Flour on Organoleptic Characteristics and Level of Liked on Donuts - Harianja, Resi Prasetyo; MP, Prof.Dr. Ir. Junianto; M.Si, Drs. Walim Lili; M.Si, Iis Rostini S.Pi, (International Journal of Advance Research and Innovative Ideas In Education, 2022)