APA (7th ed.) Zitazioa
Crapol, E. P. (2006). John Tyler: The accidental president. University of North Carolina Press.
Chicago Style (17th ed.) Zitazioa
Crapol, Edward P. John Tyler: The Accidental President. Chapel Hill: University of North Carolina Press, 2006.
MLA (9th ed.) Zitazioa
Crapol, Edward P. John Tyler: The Accidental President. University of North Carolina Press, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.