(1975). Seaborne trade in phosphate rock and phosphoric acid up to 1980. London : Westinform.
Style de citation Chicago (17e éd.)Seaborne Trade in Phosphate Rock and Phosphoric Acid Up to 1980. London : Westinform, 1975.
Style de citation MLA (8e éd.)Seaborne Trade in Phosphate Rock and Phosphoric Acid Up to 1980. London : Westinform, 1975.
Style de citation IICA/CATIE1975. Seaborne trade in phosphate rock and phosphoric acid up to 1980. London : Westinform.
Attention : ces citations peuvent ne pas être correctes à 100%.