Não informado. (2000). Impact Assessment and Project Appraisal. International Association for Impact Assessment.
Lua i Stíl Chicago (17ú heag.)Não informado. Impact Assessment and Project Appraisal. Guildford, Inglaterra: International Association for Impact Assessment, 2000.
Lua MLA (8ú heag.)Não informado. Impact Assessment and Project Appraisal. International Association for Impact Assessment, 2000.
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