Snyder, Charles R., author
Sage , 2007
Buku Teks
Snyder, Charles R., author
Sage, 2015
Buku Teks
McClintic, J. Robert, author
John Wiley & Sons, 1980
Buku Teks
Noor, Abdun, author
World Bank, 1981
Buku Teks
Ruckdeschel, F. R.
Byte/McGraw-Hill, 1981
Buku Teks