Dunlop, John K.
Oswald Wolff, 1965
Buku Teks
Treitschke, Heinrich von
The University of Chicago Press, 1975
Buku Teks
Treue, Wolfgang, author
Inter Nationes, 1969
Buku Teks
Frampton, Kenneth, author
Thames and Hudson, 1992
Buku Teks
Lettrich, Jozef
Frederick A. Praeger, 1955
Buku Teks