Shanti, Ratna, dan Ratna Nirmala. 2018. “Respon Tiga Varietas Ubi Kayu (Manihot Esculenta. L) Terhadap Pemupukan Di Kutai Timur”. Jurnal Pertanian Terpadu 6 (1), 46-58. https://doi.org/10.36084/jpt. v6i1.142.