APA
Library of Congress, Library of Congress, . (1990). Annual report of the librarian of congrass, 1989. Washington: D.C. Library of congress.
Chicago
Library of Congress, Library of Congress, . 1990. Annual report of the librarian of congrass, 1989. Washington: D.C. Library of congress.
Harvard
Library of Congress, Library of Congress, . (1990). Annual report of the librarian of congrass, 1989. Washington: D.C. Library of congress.
MLA
Library of Congress, Library of Congress, . Annual report of the librarian of congrass, 1989. Washington: D.C. Library of congress. 1990.
