Engel, B. A. (2015). Russian in world history. Univ., pr..
Chicago-čujuhus (17. p.)Engel, Barbara Alpern. Russian in World History. Oxford: Univ., pr., 2015.
MLA-čujuhus (9. p.)Engel, Barbara Alpern. Russian in World History. Univ., pr., 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.