APA (7th ed.) Citation

United States. Bureau of the Census. (1992). The 1990 United States Census. Project Gutenberg.

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. The 1990 United States Census. Project Gutenberg, 1992.

MLA (9th ed.) Citation

United States. Bureau of the Census. The 1990 United States Census. Project Gutenberg, 1992.

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