Rules for descriptive cataloging in the Library of Congress.
APA Citation
Library of Congress. Descriptive Cataloging Division. (1947). Rules for descriptive cataloging in the Library of Congress. Prelim. ed. Washington: U. S. Govt. Print. Off..
MLA Citation
Library of Congress. Descriptive Cataloging Division. Rules for Descriptive Cataloging In the Library of Congress. Prelim. ed. Washington: U. S. Govt. Print. Off., 1947.
Warning: These citations may not always be complete (especially for serials).