edited by Robbin F. Laird and Erik P. Hoffman
Aldine de Gruyter, 1986
Buku Teks
edited by Sewerlyn Bialer
Westview Press, 1981
Buku Teks
Dallin, David J., author
Yale University Press, 1942
Buku Teks
Beloff, Max, author
Oxford University Press, 1947
Buku Teks
edited by Egbert Jahn
St Martin's Press, 1978
Buku Teks