Cita APA (7a ed.)
(1973). A working system for classification of world vegetation. IUCN.
Cita Chicago Style (17a ed.)
A Working System for Classification of World Vegetation. Morges: IUCN, 1973.
Cita MLA (9a ed.)
A Working System for Classification of World Vegetation. IUCN, 1973.
Precaución: Estas citas no son 100% exactas.