Cita APA

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

Citación estilo Chicago

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

Cita MLA

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