APA (7th ed.) Citation

U. S. Library of Congress. Information Systems Office. (1970). Marc manuals used by the Library of Congress (2nd ed.). Information Science and Automation Division, American Library Association.

Chicago Style (17th ed.) Citation

U. S. Library of Congress. Information Systems Office. Marc Manuals Used by the Library of Congress. 2nd ed. Chicago: Information Science and Automation Division, American Library Association, 1970.

MLA (9th ed.) Citation

U. S. Library of Congress. Information Systems Office. Marc Manuals Used by the Library of Congress. 2nd ed. Information Science and Automation Division, American Library Association, 1970.