APA (7th ed.) Citation

Library of Congress. Copyright Office. (2004). U.S. Copyright Renewals 1950 - 1977. Project Gutenberg.

Chicago Style (17th ed.) Citation

Library of Congress. Copyright Office. U.S. Copyright Renewals 1950 - 1977. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Library of Congress. Copyright Office. U.S. Copyright Renewals 1950 - 1977. Project Gutenberg, 2004.

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