Faizah, R., S. Wening, H. Y. Rahmadi, and A. R. Purba. “GENETIC VARIATION OF E. Oleifera POPULATION AND POPULATION E. Guineensis X E. Oleifera ON NUTFAH PLASMA COLLECTION PPKS”. Jurnal Penelitian Kelapa Sawit, Vol. 24, no. 1, Apr. 2016, pp. 13-22, doi:10.22302/iopri.jur.jpks.v24i1.3.