N. Suthama, B. Sukamto, I. Mangisah, and L. Krismiyanto, “Immune Status and Growth of Broiler Fed Diet with Microparticle Protein Added with Natural Acidifier”, Trop. Anim. Sci. J., vol. 44, no. 2, pp. 198–204, Jun. 2021, doi: 10.5398/tasj.2021.44.2.198.