Não informado. (1967). Phosphorus in agriculture. International Superphosphate and Compound Manufacturers Association.
Cita Chicago Style (17a ed.)Não informado. Phosphorus in Agriculture. London: International Superphosphate and Compound Manufacturers Association, 1967.
Cita MLA (8a ed.)Não informado. Phosphorus in Agriculture. International Superphosphate and Compound Manufacturers Association, 1967.
Precaución: Estas citas no son 100% exactas.