APA (7th ed.) Citation

Perkins, D. (1975). The Monroe doctrine, 1823-1826. Harvard University Press.

Chicago Style (17th ed.) Citation

Perkins, Dexter. The Monroe Doctrine, 1823-1826. Cambridge: Harvard University Press, 1975.

MLA (9th ed.) Citation

Perkins, Dexter. The Monroe Doctrine, 1823-1826. Harvard University Press, 1975.