Yulianto, Gunawan, et al. “EVALUASI PROGRAM TENAGA HARIAN LEPAS TENAGA BANTU PENYULUH PERTANIAN (SEBUAH PENELITIAN DI PROPINSI DAERAH ISTIMEWA YOGYAKARTA TAHUN 2007) (EVALUATION ON THE CONTRACT-BASED AGRICULTURE EXTENSION WORKERS PROGRAM - A RESEARCH IN D.I. YOGYAKARTA PROVINCE IN ”. Jurnal Ilmu-Ilmu Pertanian, vol. 4, no. 1, July 2008, pp. 61-74, https://jiip.polbangtanyoma.ac.id/index.php/jiip/article/view/223.