MUHAMMAD NASHRUDDIN. PENGARUH KEMAMPUAN DAN MOTIVASI KERJA PETANI TERHADAP PRODUKTIVITAS SEMANGKA DI LAHAN KERING KECAMATAN JEROWARU. jir [Internet]. 2020 Feb. 10 [cited 2024 May 6];6(1):141-53. Available from: https://jurnal.ugr.ac.id/index.php/jir/article/view/108