FAO. (2003). Data sets, indicators and methods to assess land degradation in drylands: Report of the LADA e-mail conference 9 Ôctber - 4 November 2002. Rome, Italy: FAO.
Chicago-tyylinen lähdeviittausFAO. Data Sets, Indicators and Methods to Assess Land Degradation in Drylands: Report of the LADA E-mail Conference 9 Ôctber - 4 November 2002. Rome, Italy: FAO, 2003.
MLA-viiteFAO. Data Sets, Indicators and Methods to Assess Land Degradation in Drylands: Report of the LADA E-mail Conference 9 Ôctber - 4 November 2002. Rome, Italy: FAO, 2003.
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