Ferris, Kenneth R.
Richard D. Irwin, 1989
Buku Teks
Ferris, Kenneth R.
McGraw-Hill/Irwin, 1996
Buku Teks
Gibson, Charles H.
South Western College , 2001
Buku Teks
Ferris, Kenneth R.
Richard D. Irwin, 1990
Buku Teks
Gross, Malvern J.
John Wiley & Sons, 1979
Buku Teks