Citazione Stile APA (7a Edizione)

Vernadsky, G. (1969). A history of Russia (6th rev. ed.). Yale University Press.

Citazione stile Chigago Style (17a edizione)

Vernadsky, George. A History of Russia. 6th rev. ed. New Haven: Yale University Press, 1969.

Citatione MLA (8a ed.)

Vernadsky, George. A History of Russia. 6th rev. ed. Yale University Press, 1969.