APA (7th ed.) Citation

United States. Army. Corps of Engineers. Baltimore District. (1991). Washington Aqueduct Division ([Rev. Apr. 1991].). US Army Corps of Engineers, Baltimore District.

Chicago Style (17th ed.) Citation

United States. Army. Corps of Engineers. Baltimore District. Washington Aqueduct Division. [Rev. Apr. 1991]. [Baltimore, Md.]: US Army Corps of Engineers, Baltimore District, 1991.

MLA (9th ed.) Citation

United States. Army. Corps of Engineers. Baltimore District. Washington Aqueduct Division. [Rev. Apr. 1991]. US Army Corps of Engineers, Baltimore District, 1991.