Citazione Stile APA (7a Edizione)

Library of Congress. (1975). The Library of Congress main reading room reference collection subject catalog. Library of Congress.

Citazione stile Chigago Style (17a edizione)

Library of Congress. The Library of Congress Main Reading Room Reference Collection Subject Catalog. Washington: Library of Congress, 1975.

Citatione MLA (9a ed.)

Library of Congress. The Library of Congress Main Reading Room Reference Collection Subject Catalog. Library of Congress, 1975.