Yuwono, Triwibowo Dwidjono Hadi Darwanto Masyhuri Didik Indradewa Susamto Somowiyarjo Sunarru Samsi Hariadi text Yogyakarta : Gadjah Mada University Press, 2011 ind Usaha Tani, Pertanian, Teknologi Pertanian URN:ISBN:979-420-770-5