Stephen M. Horan, editor
John Wiley & Sons, 2009
Buku Teks
Amling, Frederick
Irwin, 1986
Buku Teks
Hallman, G. Victor
McGraw-Hill , 1983
Buku Teks
Greene, Mark R.
South-Western Publishing CO., 1983
Buku Teks
Richards, R. Malcolm
Scott, Foresman, 1984
Buku Teks