Kurniawati, Ari, et al. “Diversity of Functional Soil Microbes in Manures and Its Effect on Organic Mustard Green (Brassica Juncea) Production”. Journal of Tropical Crop Science, vol. 6, no. 01, Feb. 2019, pp. 60-66, doi:10.29244/jtcs.6.01.60-66.