MLA

Seton-Watson, Hugh. The Russian Empire, 1801-1917. Oxford: Clarendon Press, 1967.

APA

Seton-Watson, H. (1967). The Russian empire, 1801-1917. Oxford: Clarendon Press.

Chicago

Seton-Watson, Hugh, The Russian Empire, 1801-1917. Oxford: Clarendon Press, 1967.