Suryani, N.N., Suarna, I.W., Mahardika, I.G., Sarini, N.P. and Doloksaribu, L. 2020. Energy and Nitrogen Retention of Bali Heifers (Bos sondaicus) Fed Diet Containing Different Energy Protein Level. TERNAK TROPIKA Journal of Tropical Animal Production. 21, 1 (Jun. 2020), 69–76. DOI:https://doi.org/10.21776/ub.jtapro.2020.021.01.9.