Widyodaru , Nurcahyo, dkk. “Pengaruh Kombinasi Media Tanam Dan Dosis Pupuk Npk Terhadap Pertumbuhan Tanaman Tubo Bala (globba Leucantha Var. Bicolor Holttum)”. Jurnal Agrotek Indonesia, vol. 7, no. 2, Agustus 2022, hlm. 33-41, https://journal.unsika.ac.id/index.php/agrotek/article/view/5667.