Still, Richard R., author
Prentice-Hall, 1958
Buku Teks
Blackwell, William
Wiley, 1984
Buku Teks
Whaley, Douglas J.
Little, Brown & Co., 1993
Buku Teks
Weilbacher, William M.
Macmillan, 1981
Buku Teks
Brannen, William H.
Prentice-Hall, 1983
Buku Teks