Citazione APA

Library of Congress. (1939). Annual report of the Librarian of Congress for the fiscal year ended . ([Departmental ed.].). U.S. G.P.O..

Stile di citazione Chicago

Library of Congress. Annual Report of the Librarian of Congress for the Fiscal Year Ended . [Departmental ed.]. Washington: U.S. G.P.O., 1939.

Citazione MLA

Library of Congress. Annual Report of the Librarian of Congress for the Fiscal Year Ended . [Departmental ed.]. U.S. G.P.O., 1939.