Mahmud, Amir, et al. “Analisis Kinerja Petugas Pengendali Organisme Pengganggu Tumbuhan Di Kabupaten Subang”. Jurnal Ilmu Pertanian Indonesia, vol. 26, no. 3, June 2021, pp. 392-9, https://doi.org/10.18343/jipi.26.3.392.