Rosa, Rahayu Novrina, and Sofyan Zaman. “Pengelolaan Pembibitan Tanaman Kelapa Sawit (Elais Guineensis Jacq.) Di Kebun Bangun Bandar, Sumatera Utara”. Buletin Agrohorti, vol. 5, no. 3, Nov. 2017, pp. 325-33, https://doi.org/10.29244/agrob.v5i3.16470.