APA Citation

Schulzinger, R. D. (1990). American diplomacy in the twentieth century (2. ed.). New York: Oxford University Press.

Chicago Style Citation

Schulzinger, Robert D. American Diplomacy in the Twentieth Century. 2. ed. New York: Oxford University Press, 1990.

MLA Citation

Schulzinger, Robert D. American Diplomacy in the Twentieth Century. 2. ed. New York: Oxford University Press, 1990.

Warning: These citations may not always be 100% accurate.