Aelvoet, M., Agger, P., Beke, F., & Bilsborough, S. (2002). Conference report: Environmental indicators and sustainable development trends. Brussel: MiNa-Raad.
Lua i Stíl Chicago (17ú heag.)Aelvoet, Magda, Peder Agger, Frank Beke, agus Simon Bilsborough. Conference Report: Environmental Indicators and Sustainable Development Trends. Brussel: MiNa-Raad, 2002.
Lua MLA (8ú heag.)Aelvoet, Magda, et al. Conference Report: Environmental Indicators and Sustainable Development Trends. Brussel: MiNa-Raad, 2002.
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