Cita APA

World Congress on National Parks and Protected Areas, I. t. (1992). World Heritage Twenty Years Later. Caracas: IUCN.

Citación estilo Chicago

World Congress on National Parks and Protected Areas, IV th. World Heritage Twenty Years Later. Caracas: IUCN, 1992.

Cita MLA

World Congress on National Parks and Protected Areas, IV th. World Heritage Twenty Years Later. Caracas: IUCN, 1992.

Precaución: Estas citas no son 100% exactas.