Marsh, William M.
John Wiley & Sons, 2005
Buku Teks
Elsevier Science B.V.,
Majalah, Jurnal, Buletin
Steiner, Frederick R.
McGraw-Hill, 2000
Buku Teks
Pregill, Philip
New York: John Wiley & Sons, c1999
Buku Teks
Steiner, Frederick R.
McGraw-Hill, 1999
Buku Referensi