Beloff, Max, author
Oxford University Press, 1947
Buku Teks
Progress Publisher, 1981
Buku Teks
Oxford University Press, 1951
Buku Teks
Dallin, David J., author
Yale University Press, 1942
Buku Teks
edited by Robbin F. Laird and Erik P. Hoffman
Aldine de Gruyter, 1986
Buku Teks