Elliott, Barry, author
Prentice Hall, Financial Times, 2008
Buku Teks
Ferris, Kenneth R., author
Richard D. Irwin, 1989
Buku Teks
Ferris, Kenneth R., author
McGraw-Hill/Irwin, 1996
Buku Teks
Gibson, Charles H., author
South Western College , 2001
Buku Teks
Ferris, Kenneth R., author
Richard D. Irwin, 1990
Buku Teks