Monnerot, Jules, author
George Allen and Unwin, 1953
Buku Teks
Cronyn, George W., author
E.P. Dutton, 1958
Buku Teks
Swearingen, Rodger, author
American Bar Association, 1967
Buku Teks
Borkenau, Franz
University of Michigan Press, 1962
Buku Teks
Nollau, Gùˆnther, 1911-1991, author
Frederick A. Praeger, 1961
Buku Teks