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..
Цитирование в стиле Чикаго (17-е изд.)International Union for Conservation of Nature и 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.
Цитирование MLA (8-е изд.)International Union for Conservation of Nature и 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.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.