Willy Gianinazzi, " Penser global, agir local. Histoire d'une idée ", EcoRev'. Revue critique d'écologie politique, N. 46, Summer 2018, p. 24, who quotes: Rene Dubos, " The despairing optimist ", The American Scholar, Spring 1977, p. 156.
foei.org
"History". Friends of the Earth International (به انگلیسی). 2014-04-01. Archived from the original on 28 April 2021. Retrieved 2019-08-16.
