Cita APA (7th ed.)

Vernadsky, G., & Karpovich, M. (1943). A history of Russia. Yale University Press.

Cita Chicago (17th ed.)

Vernadsky, George, i Michael Karpovich. A History of Russia. [New Haven: Yale University Press, 1943.

Cita MLA (9th ed.)

Vernadsky, George, i Michael Karpovich. A History of Russia. Yale University Press, 1943.