Mills, N. L., & Porras, I. T. (2002). Silver bullet or fools' gold?: A global review of markets for forest environmental services and their impact on the poor. International Institute for Environment and Development.
Lua i Stíl Chicago (17ú heag.)Mills, Natasha Landell, agus Ina T. Porras. Silver Bullet or Fools' Gold?: A Global Review of Markets for Forest Environmental Services and Their Impact on the Poor. London: International Institute for Environment and Development, 2002.
Lua MLA (9ú heag.)Mills, Natasha Landell, agus Ina T. Porras. Silver Bullet or Fools' Gold?: A Global Review of Markets for Forest Environmental Services and Their Impact on the Poor. International Institute for Environment and Development, 2002.
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