Lidia, S. Ngapiyatun, wartomo, B. Winarni, and W. Pratiwi, “Perhitungan Produktivitas dan Kebutuhan Karyawan Panen Kelapa Sawit di PT. Alam Jaya Persada, Kutai Kartanegara, Kalimantan Timur: Calculation of Employee Productivity and Requirements to Harvest Oil Palm at PT. Alam Jaya Persada, Kutai Kartanegara, East Kalimantan”, buletinloupe, vol. 19, no. 02, pp. 200–206, Dec. 2023.