Cita APA

Gustavsson, N., & Gustavsson, N. (2001). Geochemical landscapes of the conterminous United States: New map presentations for 22 elements. Denver, Colo.: U.S. Departamento of the Interior, Geological Survey.

Citación estilo Chicago

Gustavsson, N., y N. Gustavsson. Geochemical Landscapes of the Conterminous United States: New Map Presentations for 22 Elements. Denver, Colo.: U.S. Departamento of the Interior, Geological Survey, 2001.

Cita MLA

Gustavsson, N., y N. Gustavsson. Geochemical Landscapes of the Conterminous United States: New Map Presentations for 22 Elements. Denver, Colo.: U.S. Departamento of the Interior, Geological Survey, 2001.