International Union for Conservation of Nature and Natural Resources Commission on Education, International Union for Conservation of Nature and Natural Resources, & World Conservation Strategy. (1984). An introduction to the world conservation strategy. IUCN, United Nations Environment Programme.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Union for Conservation of Nature and Natural Resources Commission on Education, International Union for Conservation of Nature and Natural Resources, και World Conservation Strategy. An Introduction to the World Conservation Strategy. [Gland, Switzerland]: IUCN, United Nations Environment Programme, 1984.
Παραπομπή σε μορφή MLA (9th εκδ.)International Union for Conservation of Nature and Natural Resources Commission on Education, et al. An Introduction to the World Conservation Strategy. IUCN, United Nations Environment Programme, 1984.