Yadnya, T. G. B., A. A. A. S. Trisnadewi, I. K. Sukada, and I. G. L. Oka. “The Effect of Offered Diet Containing Rice Hull and Mono Sodium Glutamate (msg) and Effective Microorganism -4 (em-4) Solution on the Performance of Campbell Duck”. International Research Journal of Engineering, IT & Scientific Research, vol. 2, no. 11, Nov. 2016, pp. 75-82, https://sloap.org/journals/index.php/irjeis/article/view/523.