Cita APA (7a ed.)

Korff, S. A. (1922). Russia's foreign relations during the last half century. MacMillan.

Cita Chicago Style (17a ed.)

Korff, S. A. Russia's Foreign Relations During the Last Half Century. New York: MacMillan, 1922.

Cita MLA (9a ed.)

Korff, S. A. Russia's Foreign Relations During the Last Half Century. MacMillan, 1922.