Crawford, Daniel J., author
John Wiley & Sons, 1990
Buku Teks
E. Boer, editor
Backhuys Publishers, 2000
Buku Teks
editors, M. Brink, R.P. Escobin
Backhuys , 2003
Buku Teks
Welsh, James R., author
Erlangga, 1991
Buku Teks
Sinha, Umakant
Vikas Publishing House , 1982
Buku Teks