Keefe, William J., author
Prentice-Hall, 1994
Buku Teks
Ahmad Hasan Suryanegara
Darul Falah, 1999
Buku Teks
Weiss, Leonard W., author
John Wiley & Sons, 1980
Buku Teks
Johns Hopkins University Press, 1979
Buku Teks
Austin, Kenneth M.
Sage, 1990
Buku Teks