APA Citation

(1990). The 1990 United States census. Champaign, Ill.: Project Gutenberg.

Chicago Style Citation

The 1990 United States Census. Champaign, Ill.: Project Gutenberg, 1990.

MLA Citation

The 1990 United States Census. Champaign, Ill.: Project Gutenberg, 1990.

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