APA (7th ed.) Citation

Mayo, L. A. (2006). President James K. Polk: The dark horse president. Nova History Publications.

Chicago Style (17th ed.) Citation

Mayo, Louise A. President James K. Polk: The Dark Horse President. New York: Nova History Publications, 2006.

MLA (9th ed.) Citation

Mayo, Louise A. President James K. Polk: The Dark Horse President. Nova History Publications, 2006.