Siahaan, M. “The TRAINING AND CERTIFICATION OF SAMPLE TAKING FOR SAMPLE TAKING OFFICER AT PTP NUSANTARA III (PERSERO), REGIONAL II, KEBUN PABATU”. DEDIKASI Jurnal Pengabdian Kepada Masyarakat, vol. 3, no. 1, Apr. 2025, pp. 20-29, https://ejurnal.itsi.ac.id/index.php/JAD/article/view/264.