APA

Natural Agricultural and Food Policy workshop, Spitze R. G. F., . (1990). Agricultural and food policy issues and alternatives for the 1990s. Illinois: University of Illinois. Departament of Agricultural Economics.

Chicago

Natural Agricultural and Food Policy workshop, Spitze Robert G F, . 1990. Agricultural and food policy issues and alternatives for the 1990s. Illinois: University of Illinois. Departament of Agricultural Economics.

Harvard

Natural Agricultural and Food Policy workshop, Spitze R. G. F., . (1990). Agricultural and food policy issues and alternatives for the 1990s. Illinois: University of Illinois. Departament of Agricultural Economics.

MLA

Natural Agricultural and Food Policy workshop, Spitze Robert G F, . Agricultural and food policy issues and alternatives for the 1990s. Illinois: University of Illinois. Departament of Agricultural Economics. 1990.