Crotty, William J., author
Little, Brown, 1980
Buku Teks
Thumm, Garold W., author
Prentice-Hall, 1967
Buku Teks
Weyl, Walter E.
N.Y. Harper & Row , 1964
Buku Teks
Herring, E. Pendleton, author
Norton, 1966
Buku Teks
Gettell, Raymond G.
Appleton-Century-Crofts, 1928
Buku Teks