United Nations Industrial Development Organization. (1978). Process technologies for phosphate fertilizers. United Nations Industrial Development Organization.
Citazione stile Chigago Style (17a edizione)United Nations Industrial Development Organization. Process Technologies for Phosphate Fertilizers. New York: United Nations Industrial Development Organization, 1978.
Citatione MLA (9a ed.)United Nations Industrial Development Organization. Process Technologies for Phosphate Fertilizers. United Nations Industrial Development Organization, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.