Cita APA (7a ed.)

Thomas, D. Y. (1923). One hundred years of the Monroe doctrine, 1823-1923. MacMillan.

Cita Chicago Style (17a ed.)

Thomas, David Y. One Hundred Years of the Monroe Doctrine, 1823-1923. New York: MacMillan, 1923.

Cita MLA (9a ed.)

Thomas, David Y. One Hundred Years of the Monroe Doctrine, 1823-1923. MacMillan, 1923.