Gabriel, Abdurrahman, et al. “Pengelolaan Sistem Panen Kelapa Sawit (Elaeis Guineensis Jacq.) Di Kebun Rambutan, Serdang Berdagai, Sumatera Utara”. Buletin Agrohorti, vol. 11, no. 3, Sept. 2023, pp. 331-7, https://doi.org/10.29244/agrob.v11i3.48629.