edited by Alexander Dalllin, Gail W. Lapidus
Westview press, 1991
Buku Teks
Lamont, Corliss
Philosophical Library, 1952
Buku Teks
Oxford University Press, 1951
Buku Teks
Dallin, David
Hollis & Carter, 1949
Buku Teks
Shteppa, Konstantin F.
Rutgers University Press, 1962
Buku Teks