Regal, M., F. Fathurrahman, and Z. Basri. “Pengaruh Sungkup Dan Mulsa Terhadap Pertumbuhan Dan Hasil Bawang Merah (Allium. Ascalonicum.L) Kultivar Napu”. AGROTEKBIS : JURNAL ILMU PERTANIAN (e-Journal), Vol. 5, no. 1, Feb. 2017, pp. 46 -52, http://103.245.72.23/index.php/agrotekbis/article/view/103.