Hariadi SS. SERTIFIKASI, DISIPLIN, DAN PRODUKTIVITAS KERJA PENYULUH PERTANIAN (CERTIFCATION, DISCIPLINE, AND WORK PRODUKTIVITYOF FIELD EXTENSION WORKERS). JIIP [Internet]. 2010 Jul. 15 [cited 2025 Feb. 8];6(1):1-9. Available from: https://jiip.polbangtanyoma.ac.id/index.php/jiip/article/view/202