Maurer, Ward Douglas
Holden-Day, 1972
Buku Teks
Brainerd, Walter S.
Harper and Row , 1979
Buku Teks
George, F.H.
Pergamon Press, 1968
Buku Teks
Deitel, Harvey M., 1945-
Prentice-Hall, 1977
Buku Teks
Zelle, John
Franklin, Beedle and Associates, 2010
Buku Teks