Endrawati, Budiani Fitria, et al. “The Production of Botanical Pesticides from Cigarette Butts: A Study of the Tunas Harapan Farmers Group at KM 20, North Balikpapan”. Seminar Nasional Pengabdian Kepada Masyarakat (SEPAKAT), vol. 4, no. 1, Jan. 2026, pp. pages 43-48, https://journal.itk.ac.id/index.php/sepakat/article/view/8481672.