International Union for Conservation of Nature & World Wildlife Fund. (1987). Joint IUCN-WWF Plant Advisory Group: Minutes of the Fourth Meeting : World Conservation Centre, Gland, Switzerland, 22-23 May 1987 : Confidential. S.n..
Style de citation Chicago (17e éd.)International Union for Conservation of Nature et World Wildlife Fund. Joint IUCN-WWF Plant Advisory Group: Minutes of the Fourth Meeting : World Conservation Centre, Gland, Switzerland, 22-23 May 1987 : Confidential. S.l.: S.n., 1987.
Style de citation MLA (8e éd.)International Union for Conservation of Nature et World Wildlife Fund. Joint IUCN-WWF Plant Advisory Group: Minutes of the Fourth Meeting : World Conservation Centre, Gland, Switzerland, 22-23 May 1987 : Confidential. S.n., 1987.
Attention : ces citations peuvent ne pas être correctes à 100%.