APA
LIBRARY OF CONGRESS, LIBRARY OF CONGRESS, . (1989). Annuali report of the Librarian of congress. Washington: Library of Congress.
Chicago
LIBRARY OF CONGRESS, LIBRARY OF CONGRESS, . 1989. Annuali report of the Librarian of congress. Washington: Library of Congress.
Harvard
LIBRARY OF CONGRESS, LIBRARY OF CONGRESS, . (1989). Annuali report of the Librarian of congress. Washington: Library of Congress.
MLA
LIBRARY OF CONGRESS, LIBRARY OF CONGRESS, . Annuali report of the Librarian of congress. Washington: Library of Congress. 1989.
