RIZAL, M. “RESPON PUPUK HAYATI AGRI SIMBA TERHADAP PERTUMBUHAN BIBIT SAWIT (Elaeis Guineensis) DI MAIN NURSERY”. Jurnal Ilmiah Pertanian, Vol. 7, no. 2, Feb. 2010, pp. 42-49, doi:10.31849/jip.v7i2.1323.