APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.