APA (7th ed.) Citation
CIDA, IUCN, UNEP, & WWF. (1991). Caring for the earth: A strategy for sustainable living. IUCN.
Chicago Style (17th ed.) Citation
CIDA, IUCN, UNEP, and WWF. Caring for the Earth: A Strategy for Sustainable Living. IUCN, 1991.
MLA (9th ed.) Citation
CIDA, et al. Caring for the Earth: A Strategy for Sustainable Living. IUCN, 1991.
Warning: These citations may not always be 100% accurate.