Cita APA

IUCN. (1974). Biotic provinces of the world; furthen development of a system for defining and classifying natural regions for purposes of conservation. Switzerland: IUCN.

Citación estilo Chicago

IUCN. Biotic Provinces of the World; Furthen Development of a System for Defining and Classifying Natural Regions for Purposes of Conservation. Switzerland: IUCN, 1974.

Cita MLA

IUCN. Biotic Provinces of the World; Furthen Development of a System for Defining and Classifying Natural Regions for Purposes of Conservation. Switzerland: IUCN, 1974.