Manumono, Danang, 		Masyhuri, Masyhuri, 		Hartono, Slamet, AND 		Suryantini, Ani.
" TRADE OFF SISTEM USAHATANI TEMBAKAU DI WILAYAH SUMBING TEMANGGUNG JAWA TENGAH" <em>JSEP (Journal of Social and Agricultural Economics)</em> [Online], Volume 4 Number 1 (1 March 2010)