Manlea, H. “Geostatistical Analysis of Plastic Waste Disposal to Ecosystem (Vegetation) in Kefamenanu of North Central Timor Regency”. Journal of Applied Chemical Sciences, Vol. 5, no. 2, Oct. 2018, pp. 477-82, https://ejurnal.undana.ac.id/index.php/jacs/article/view/1991.