International Union for the Protection of Nature. (1954). The position of nature protection throughout the world in 1950. Wildlife Management Institute, Washington.
Style de citation Chicago (17e éd.)International Union for the Protection of Nature. The Position of Nature Protection Throughout the World in 1950. Brussels: Wildlife Management Institute, Washington, 1954.
Style de citation MLA (9e éd.)International Union for the Protection of Nature. The Position of Nature Protection Throughout the World in 1950. Wildlife Management Institute, Washington, 1954.
Attention : ces citations peuvent ne pas être correctes à 100%.