APA (7th ed.) Citation

(1974). Census tracts, 1970, Washington urban area, D.C., MD, and VA. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Census Tracts, 1970, Washington Urban Area, D.C., MD, and VA. Washington, D.C: U.S. Geological Survey, 1974.

MLA (9th ed.) Citation

Census Tracts, 1970, Washington Urban Area, D.C., MD, and VA. U.S. Geological Survey, 1974.