Caeilli, William, author
Macmillan, 1991
Buku Teks
edited by Ejup N. Ganic, Tyler G. Hicks
McGraw-Hill, 1991
Buku Teks
Greenfield, James M., author
John Wiley & Sons, 2001
Buku Teks
Yearsley, R.B., author
Gower Press, 1974
Buku Referensi
Goyal, R.C., author
Prenctice Hall of India, 1998
Buku Teks