Cita APA (7th ed.)

Library of Congress. MARC Development Office. (1974). Information on the MARC system (4th ed.). Library of Congress.

Cita Chicago (17th ed.)

Library of Congress. MARC Development Office. Information on the MARC System. 4th ed. Washington: Library of Congress, 1974.

Cita MLA (9th ed.)

Library of Congress. MARC Development Office. Information on the MARC System. 4th ed. Library of Congress, 1974.