APA (7th ed.) Citation

Library of Congress & Library of Congress. Public Affairs Office. (1972). Library of Congress information bulletin. Library of Congress.

Chicago Style (17th ed.) Citation

Library of Congress and Library of Congress. Public Affairs Office. Library of Congress Information Bulletin. [Washington, D.C.]: Library of Congress, 1972.

MLA (9th ed.) Citation

Library of Congress and Library of Congress. Public Affairs Office. Library of Congress Information Bulletin. Library of Congress, 1972.