Estados Unidos. Library of Congress. (1974). Information on the Marc system. [S.l.]: Library of Congress.
Chicago Style CitationEstados Unidos. Library of Congress. Information On the Marc System. [S.l.]: Library of Congress, 1974.
MLA CitationEstados Unidos. Library of Congress. Information On the Marc System. [S.l.]: Library of Congress, 1974.
Warning: These citations may not always be 100% accurate.