Organisation for Economic Co-operation and Development. Development Centre. (1972). Phosphate rock and phosphatic fertilizers in the world: (role of international aid).
Citazione stile Chigago Style (17a edizione)Organisation for Economic Co-operation and Development. Development Centre. Phosphate Rock and Phosphatic Fertilizers in the World: (role of International Aid). Paris, 1972.
Citatione MLA (8a ed.)Organisation for Economic Co-operation and Development. Development Centre. Phosphate Rock and Phosphatic Fertilizers in the World: (role of International Aid). 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.