Syahruddin, E., Herawaty, R., & Ningrat, R. (2014). Effect of Substitution of Leaves and Seeds of Rubber (Hevea Brasilliensis) Fermentation with Soybean Meal on the Performance of Broilers. Pakistan Journal of Nutrition, 13(7), 422–426. https://doi.org/10.3923/pjn.2014.422.426