Shacford, R.H., author
Public Affairs Press, 1952
Buku Teks
Lamont, Corliss, author
Philosophical Library, 1952
Buku Teks
Oxford University Press, 1951
Buku Teks
Fischer, George, author
Harvard University Press, 1952
Buku Teks
edited by Alexander Dallin, Gail W. Lapidus
Westerview Press, 1991
Buku Teks