Cita APA (7a ed.)

Ellis, R. E. (1987). The Union at risk: Jacksonian democracy, states' rights, and the nullification crisis. Oxford University Press.

Cita Chicago Style (17a ed.)

Ellis, Richard E. The Union at Risk: Jacksonian Democracy, States' Rights, and the Nullification Crisis. New York, New York ; Oxford, [England]: Oxford University Press, 1987.

Cita MLA (8a ed.)

Ellis, Richard E. The Union at Risk: Jacksonian Democracy, States' Rights, and the Nullification Crisis. Oxford University Press, 1987.