The World Bank / FAO / UNIDO / Industry / Fertilizer Working Group. (1994). World and regional supply and demand balances for nitrogen, phosphate, and potash, 1992/99-1998. The World Bank.
Chicago-viite (17. p.)The World Bank / FAO / UNIDO / Industry / Fertilizer Working Group. World and Regional Supply and Demand Balances for Nitrogen, Phosphate, and Potash, 1992/99-1998. Washington, D.C: The World Bank, 1994.
MLA-viite (9. p.)The World Bank / FAO / UNIDO / Industry / Fertilizer Working Group. World and Regional Supply and Demand Balances for Nitrogen, Phosphate, and Potash, 1992/99-1998. The World Bank, 1994.
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