Subagio, Herman, and Sudarmadi Purnomo. “KELAYAKAN DAN PELUANG USAHA TANI ANGGUR DI KOTA PROBOLINGGO”. Cakrawala 4, no. 1 (June 24, 2009): 76–81. Accessed August 30, 2026. http://cakrawalajournal.org/index.php/cakrawala/article/view/118.