APA (7th ed.) Citation

United States. Bureau of the Census. (1990). PL. 94-171 county block map (1990). Bureau of the Census.

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. PL. 94-171 County Block Map (1990). [Washington, D.C.]: Bureau of the Census, 1990.

MLA (8th ed.) Citation

United States. Bureau of the Census. PL. 94-171 County Block Map (1990). Bureau of the Census, 1990.

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