Library of Congress. Copyright Office. (1930). Thirty-fourth annual report of Register of Copyrights for fiscal year ending June 30, 1931. GPO.
Chicago Style (17th ed.) CitationLibrary of Congress. Copyright Office. Thirty-fourth Annual Report of Register of Copyrights for Fiscal Year Ending June 30, 1931. [Washington]: GPO, 1930.
MLA (9th ed.) CitationLibrary of Congress. Copyright Office. Thirty-fourth Annual Report of Register of Copyrights for Fiscal Year Ending June 30, 1931. GPO, 1930.
Warning: These citations may not always be 100% accurate.