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..
Chicago-Zitierstil (17. Ausg.)International Union for Conservation of Nature und 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.
MLA-Zitierstil (8. Ausg.)International Union for Conservation of Nature und 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.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.