Kievan Russia

MLA

Vernadsky, George and Yarnall Collection (University of Pennsylvania). Kievan Russia. New Haven : Yale University Press, 1948.

APA

Vernadsky, G. & Yarnall Collection (University of Pennsylvania). (1948). Kievan Russia. New Haven : Yale University Press.

Chicago

Vernadsky, George and Yarnall Collection (University of Pennsylvania). Kievan Russia. New Haven : Yale University Press, 1948.