Dover Publications, 1962
Buku Teks
Muller, F Max
Verlag von Julius Klinkhardt, 1875
Buku Teks
Trotsky, Leon
The University of Michigan Press, 1932
Buku Teks
Duhamel, Georges
J. M. Dent and Sons Ltd., 1952
Buku Teks
Edward Shils
University of Chicago Press, 1976
Buku Teks