Cita APA

Gratzfeld, J. (2003). Extractive industries in Arid and Semi - Arid Zones: Environment planning and management. Gland, Switzerland: IUCN.

Citación estilo Chicago

Gratzfeld, Joachim. Extractive Industries in Arid and Semi - Arid Zones: Environment Planning and Management. Gland, Switzerland: IUCN, 2003.

Cita MLA

Gratzfeld, Joachim. Extractive Industries in Arid and Semi - Arid Zones: Environment Planning and Management. Gland, Switzerland: IUCN, 2003.

Precaución: Estas citas no son 100% exactas.