Blackwell, 2005
eBooks
Dahl, Svend
Scarecrow Press, 1968
Buku Teks SO
Reed, Chris, 1956-
Cambridge University Press, 2004
Buku Teks
Velikoretsky, A.
Foreign Languages Publishing House, [Date of publication not identified]
Buku Teks SO
Nekrasov, B.
Peace, 1965
Buku Teks SO