U.S. Library of Congress. Subject Cataloging Division & U.S. Library of Congress. Classification Division. Classification. Outline scheme of classes. (1942). Outline of the Library of Congress classification. Revised and enlarged edition of "Outline scheme of classes.". [U.S. Govt. Printing Office].
Citazione stile Chigago Style (17a edizione)U.S. Library of Congress. Subject Cataloging Division e U.S. Library of Congress. Classification Division. Classification. Outline scheme of classes. Outline of the Library of Congress Classification. Revised and Enlarged Edition of "Outline Scheme of Classes.". Washington: [U.S. Govt. Printing Office], 1942.
Citatione MLA (9a ed.)U.S. Library of Congress. Subject Cataloging Division e U.S. Library of Congress. Classification Division. Classification. Outline scheme of classes. Outline of the Library of Congress Classification. Revised and Enlarged Edition of "Outline Scheme of Classes.". [U.S. Govt. Printing Office], 1942.