APA Zitierstil

(1991). Caring for the earth: A strategy for sustainable living. Switzerland: IUCN/ENEP/WWE.

Chicago Zitierstil

Caring for the Earth: A Strategy for Sustainable Living. Switzerland: IUCN/ENEP/WWE, 1991.

MLA Zitierstil

Caring for the Earth: A Strategy for Sustainable Living. Switzerland: IUCN/ENEP/WWE, 1991.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.