APA (7th ed.) Citation

Library of Congress. (1991). The sister republics: Switzerland and the United States. Library of Congress.

Chicago Style (17th ed.) Citation

Library of Congress. The Sister Republics: Switzerland and the United States. [Washington, D.C.?]: Library of Congress, 1991.

MLA (9th ed.) Citation

Library of Congress. The Sister Republics: Switzerland and the United States. Library of Congress, 1991.

Warning: These citations may not always be 100% accurate.