edited by Robert Atwan, Valeri Vinokurov
University of Washington Press, 1990
Buku Referensi
Carr, E.H. (Edward Hallet), author
Macmillan, 1946
Buku Teks
Westview Press, 1990
Buku Teks
Riasanovsky, Nicholas V., author
Oxford University Press, 1963
Buku Teks
Kolarz, Walter
Frederick A.Praeger, 1955
Buku Teks