Sondang, Y., Anty, K., & Alfina, R. (2014). The Influence of Bioactivator Cattle Feces Against The Length of Composting and C/N Ratio from Three Kind of Organic Material. International Journal on Advanced Science, Engineering and Information Technology, 4(4), 278–281. https://doi.org/10.18517/ijaseit.4.4.416