edited by Alexander Dalllin, Gail W. Lapidus
Westview press, 1991
Buku Teks
Dallin, David
Hollis & Carter, 1949
Buku Teks
McCauley, Martin
Longman, 1993
Buku Teks
Agzamkhojayev, A., author
Foreign Language Publishing House, [date of publication not identified]
Buku Teks
New York: M.E Sharpe
Majalah, Jurnal, Buletin