APA-referens

Pratt, W. P. (1995). The Midcontinent strategic and critical minerals project. US Geological Survey circular 1124.

Chicago-stil citat

Pratt, Walden P. "The Midcontinent Strategic and Critical Minerals Project." US Geological Survey Circular 1124 1995.

MLA-referens

Pratt, Walden P. "The Midcontinent Strategic and Critical Minerals Project." US Geological Survey Circular 1124 1995.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.