. Sugiyanta and O. Septianti, “Pupuk Hayati Bacillus sp. Meningkatkan Produktivitas Tanaman Karet (Hevea brasiliensis Muell Arg.)”, Bul. Agrohorti, vol. 7, no. 1, pp. 76–83, Jan. 2019, doi: 10.29244/agrob.v7i1.24421.