risk, m. m. (1992). economic efficiency and resource productivity on small broiller farms in saudi arabi. the institute of national planning.
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումrisk, mohamed m. Economic Efficiency and Resource Productivity on Small Broiller Farms in Saudi Arabi. cairo: the institute of national planning, 1992.
MLA (9րդ խմբ.) Մեջբերումrisk, mohamed m. Economic Efficiency and Resource Productivity on Small Broiller Farms in Saudi Arabi. the institute of national planning, 1992.