United States. Army. Corps of Engineers. Civil Works Directorate. (1968). Annual report of the chief of engineers on civil works activities (Document ed.). U.S. Army Corps of Engineers.
Chicago Style (17th ed.) CitationUnited States. Army. Corps of Engineers. Civil Works Directorate. Annual Report of the Chief of Engineers on Civil Works Activities. Document ed. [Washington, D.C.?]: U.S. Army Corps of Engineers, 1968.
MLA (9th ed.) CitationUnited States. Army. Corps of Engineers. Civil Works Directorate. Annual Report of the Chief of Engineers on Civil Works Activities. Document ed. U.S. Army Corps of Engineers, 1968.
Warning: These citations may not always be 100% accurate.