Library of Congress. Copyright Office. Have a question about copyright registration? Library of Congress, Copyright Office.
Chicago Style (17th ed.) CitationLibrary of Congress. Copyright Office. Have a Question About Copyright Registration? Washington, D.C.: Library of Congress, Copyright Office.
MLA (9th ed.) CitationLibrary of Congress. Copyright Office. Have a Question About Copyright Registration? Library of Congress, Copyright Office.
Warning: These citations may not always be 100% accurate.