USMARC format for bibliographic data :
including guidelines for content designation /
prepared by Network Development and MARC Standards Office.

APA Citation

Library of Congress. Network Development and MARC Standards Office. (19941997). USMARC format for bibliographic data: including guidelines for content designation. 1994 ed. Washington: Cataloging Distribution Service, Library of Congress.

MLA Citation

Library of Congress. Network Development and MARC Standards Office. USMARC Format for Bibliographic Data: Including Guidelines for Content Designation. 1994 ed. Washington: Cataloging Distribution Service, Library of Congress, 19941997.