Cita APA (7a ed.)

Library of Congress. Subject Cataloging Division, Ellinger, W. B., & Fischer, J. (1969). Classification (Preliminary edition.). Library of Congress.

Cita Chicago Style (17a ed.)

Library of Congress. Subject Cataloging Division, Werner B. Ellinger, y John Fischer. Classification. Preliminary edition. Washington: Library of Congress, 1969.

Cita MLA (8a ed.)

Library of Congress. Subject Cataloging Division, et al. Classification. Preliminary edition. Library of Congress, 1969.