Não informado. (1971). American bibliography of agricultural economics. University of Kentucky, Department of Agricultural Economics, American Agricultural Economics.
Cytowanie według stylu Chicago (wyd. 17)Não informado. American Bibliography of Agricultural Economics. Lexington, Ky: University of Kentucky, Department of Agricultural Economics, American Agricultural Economics, 1971.
Cytowanie według stylu MLA (wyd. 8)Não informado. American Bibliography of Agricultural Economics. University of Kentucky, Department of Agricultural Economics, American Agricultural Economics, 1971.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..