APA (7th ed.) Zitazioa
Cushman, C. B. (2006). An introduction to the U.S. Congress. M.E. Sharpe.
Chicago Style (17th ed.) Zitazioa
Cushman, Charles Bancroft. An Introduction to the U.S. Congress. Armonk, N.Y.: M.E. Sharpe, 2006.
MLA (9th ed.) Zitazioa
Cushman, Charles Bancroft. An Introduction to the U.S. Congress. M.E. Sharpe, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.