Rauch, Georg von
Frederick A. Praeger, 1962
Buku Teks
Walsh, Warren Bartlett
The University of Michigan Press, 1958
Buku Teks
Carr, Edward Hallet
Macmillan, 1954
Buku Teks
Graham, Loren R.
Cambridge University Press, 1993
Buku Teks
Dallin, David
Hollis & Carter, 1949
Buku Teks