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Lua i Stíl Chicago (17ú heag.)National Research Council (U.S.). Committee to Review the Corps of Engineers Restructured Upper Mississippi River-Illinois Waterway Draft Feasibility Study agus Inc ebrary. Review of the U.S. Army Corps of Engineers Restructured Upper Mississippi-Illinois River Waterway Feasibility Study: Second Report. Washington, D.C.: National Academies Press, 2004.
Lua MLA (9ú heag.)National Research Council (U.S.). Committee to Review the Corps of Engineers Restructured Upper Mississippi River-Illinois Waterway Draft Feasibility Study agus Inc ebrary. Review of the U.S. Army Corps of Engineers Restructured Upper Mississippi-Illinois River Waterway Feasibility Study: Second Report. National Academies Press, 2004.