APA (7th ed.) Citation

Hardy Vincent, C., & Sachs, R. C. (1991). Party leaders in Congress, 1789-1991: Vital statistics. Congressional Research Service, Library of Congress.

Chicago Style (17th ed.) Citation

Hardy Vincent, Carol, and Richard C. Sachs. Party Leaders in Congress, 1789-1991: Vital Statistics. [Washington, D.C.]: Congressional Research Service, Library of Congress, 1991.

MLA (9th ed.) Citation

Hardy Vincent, Carol, and Richard C. Sachs. Party Leaders in Congress, 1789-1991: Vital Statistics. Congressional Research Service, Library of Congress, 1991.