Gould, William B., IV, author
MIT Press, 1982
Buku Teks
Schawartz, Bernard, author
At The University Press, 1955
Buku Teks
Friedman, Lawrence M., 1930-, author
Tatanusa, 2001
Buku Teks
Pound, Roscoe, author
Little, Brown, 1938
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1993
Buku Teks