Cita APA (7th ed.)
Crapol, E. P. (2006). John Tyler: The accidental president. University of North Carolina Press.
Cita Chicago (17th ed.)
Crapol, Edward P. John Tyler: The Accidental President. Chapel Hill: University of North Carolina Press, 2006.
Cita MLA (9th ed.)
Crapol, Edward P. John Tyler: The Accidental President. University of North Carolina Press, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.