Cita APA

IUCN Secretariat. (1973). A Working system for classification of World Vegetation. Morges, Switzerland: International union for conservation of nature and natural resources.

Citación estilo Chicago

IUCN Secretariat. A Working System for Classification of World Vegetation. Morges, Switzerland: International union for conservation of nature and natural resources, 1973.

Cita MLA

IUCN Secretariat. A Working System for Classification of World Vegetation. Morges, Switzerland: International union for conservation of nature and natural resources, 1973.