(1980). How to use the IUCN red data book categories. Threatened Plants Committee Secretariat, International Union for Conservation of Nature and Natural Resources.
Chicago-Zitierstil (17. Ausg.)How to Use the IUCN Red Data Book Categories. Kew: Threatened Plants Committee Secretariat, International Union for Conservation of Nature and Natural Resources, 1980.
MLA-Zitierstil (9. Ausg.)How to Use the IUCN Red Data Book Categories. Threatened Plants Committee Secretariat, International Union for Conservation of Nature and Natural Resources, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.