Mariyah, Mariyah, 		Syaukat, Yusman, 		Hartoyo, Sri, 		Fariyanti, Anna, AND 		Krisnamurthi, Bayu.
" Penentuan Umur Optimal Peremajaan Kelapa Sawit di Kabupaten Paser Kalimantan Timur" <em>Jurnal Ekonomi Kuantitatif Terapan</em> [Online], (14 February 2018)