Cita APA (7a ed.)
Schulzinger, R. D. (1990). American Diplomacy in the Twentieth Century (2. ed.). Oxford University Press.
Cita Chicago Style (17a ed.)
Schulzinger, Robert D. American Diplomacy in the Twentieth Century. 2. ed. New York: Oxford University Press, 1990.
Cita MLA (9a ed.)
Schulzinger, Robert D. American Diplomacy in the Twentieth Century. 2. ed. Oxford University Press, 1990.
Precaución: Estas citas no son 100% exactas.