Nelson, G. O. (1970). Improving the effectiveness of food aid . G.O. Nelson. Agricultural Development Council.
Citazione stile Chigago Style (17a edizione)Nelson, Gordon O. Improving the Effectiveness of Food Aid . G.O. Nelson. New York: Agricultural Development Council, 1970.
Citatione MLA (9a ed.)Nelson, Gordon O. Improving the Effectiveness of Food Aid . G.O. Nelson. Agricultural Development Council, 1970.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.