(1991). Caring for the earth: A strategy for sustainable living. Switzerland: IUCN/ENEP/WWE.
Style de citation ChicagoCaring for the Earth: A Strategy for Sustainable Living. Switzerland: IUCN/ENEP/WWE, 1991.
Style de citation MLACaring for the Earth: A Strategy for Sustainable Living. Switzerland: IUCN/ENEP/WWE, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.