Pradipta, G. W., W. Semekar, and B. T. Eddy. “Analysis of Factors Influencing The Performance of Plantation Workers in The Tlogo Plantation Semarang Regency”. Jurnal Ilmiah Econosains, Vol. 16, no. 1, Apr. 2018, pp. 23 -4, doi:10.21009/econosains.0161.03.