Library of Congress. Copyright Office. (2011). Federal copyright protection for pre-1972 sound recordings: A report of the Register of Copyrights. United States Copyright Office.
Chicago Style (17th ed.) CitationLibrary of Congress. Copyright Office. Federal Copyright Protection for Pre-1972 Sound Recordings: A Report of the Register of Copyrights. [Washington, D.C.]: United States Copyright Office, 2011.
MLA (9th ed.) CitationLibrary of Congress. Copyright Office. Federal Copyright Protection for Pre-1972 Sound Recordings: A Report of the Register of Copyrights. United States Copyright Office, 2011.
Warning: These citations may not always be 100% accurate.