APA ציטוט

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

Chicago Style Citation

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

ציטוט MLA

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