Oxford University Press, 1951
Buku Teks
Werth, Alexander
Hill and Wang, 1961
Buku Teks
Fischer, Louis, author
Princeton 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