Lettrich, Jozef
Frederick A. Praeger, 1955
Buku Teks
Peffer, Nathaniel, author
University of Michigan Press, 1958
Buku Teks
Brown, J. F.
Frederick A. Preager, 1966
Buku Teks
Hayes, Carlton J. H., author
Macmillan, 1932
Buku Teks
Palmer, R.R. (Robert Roswell), 1909-2002, author
Alfred A. Knopf, 1967
Buku Teks