Gibson, Charles H.
South Western College , 2001
Buku Teks
Gibson, Charles H.
PWS-KENT Publishing , 1989
Buku Teks
Gibson, Charles H.
South-Western, 1992
Buku Teks
Elliott, Barry
Prentice Hall, Financial Times, 2008
Buku Teks
Ferris, Kenneth R.
Richard D. Irwin, 1989
Buku Teks