Cita APA (7th ed.)

U. S. Library of Congress. Reference Department. (1949). A Guide to special book collections in the Library of Congress.

Cita Chicago (17th ed.)

U. S. Library of Congress. Reference Department. A Guide to Special Book Collections in the Library of Congress. Washington, 1949.

Cita MLA (9th ed.)

U. S. Library of Congress. Reference Department. A Guide to Special Book Collections in the Library of Congress. 1949.