(1994). IUCN red list categories: As approved by the 40th meeting of the IUCN Council, Gland, Switzerland, 30 November 1994.
Chicago-Zitierstil (17. Ausg.)IUCN Red List Categories: As Approved by the 40th Meeting of the IUCN Council, Gland, Switzerland, 30 November 1994. [Gland], 1994.
MLA-Zitierstil (9. Ausg.)IUCN Red List Categories: As Approved by the 40th Meeting of the IUCN Council, Gland, Switzerland, 30 November 1994. 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.