APA (7th ed.) Citation

Library of Congress. Copyright Office. (2004). In answer to your query: Useful articles. [U.S. Copyright Office].

Chicago Style (17th ed.) Citation

Library of Congress. Copyright Office. In Answer to Your Query: Useful Articles. [Washington, D.C.]: [U.S. Copyright Office], 2004.

MLA (9th ed.) Citation

Library of Congress. Copyright Office. In Answer to Your Query: Useful Articles. [U.S. Copyright Office], 2004.