Tansky, Leo
Frederick A. Praeger, 1967
Buku Teks
Jacoby, Neil H., author
Frederick A. Fraeger, 1966
Buku Teks
Munich : Institute for the Study of the USSR
Majalah, Jurnal, Buletin
King, Kenneth, author
Longmann Group, 1991
Buku Teks
Yevenko, Ivan Andreevich
Foreign Languages Publishing House , [1962]
Buku Teks