Herawaty, R., Jamarun, N., Zain, M., Arnim, & Ningrat, R. (2013). Effect of Supplementation Sacharonyces cerevisiae and Leucaena leucocephala on Low Quality Roughage Feed in Beef Cattle Diet. Pakistan Journal of Nutrition, 12(2), 182–184. https://doi.org/10.3923/pjn.2013.182.184