APA (7th ed.) Citation

United States. Army. Corps of Engineers. (1931). [Document not titled.]. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Corps of Engineers. [Document Not Titled.]. Washington: [publisher not identified], 1931.

MLA (9th ed.) Citation

United States. Army. Corps of Engineers. [Document Not Titled.]. [publisher not identified], 1931.

Warning: These citations may not always be 100% accurate.