Não informado. (1985). Better Crops International. Potash & Phosphate Institute.
Style de citation Chicago (17e éd.)Não informado. Better Crops International. Atlanta, Ga: Potash & Phosphate Institute, 1985.
Style de citation MLA (8e éd.)Não informado. Better Crops International. Potash & Phosphate Institute, 1985.
Attention : ces citations peuvent ne pas être correctes à 100%.