Citazione APA

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