Well, William
Prentice-Hall, 1995
Buku Teks
Belch, George E., author
McGraw-Hill, 2007
Buku Teks
Belch, George E., author
McGraw-Hill, [, 2004]
Buku Teks
Rossiter, John R., author
Irwin/McGraw-Hiil, 1996
Buku Teks
Barban, Arnold M., author
Richard D. Irwin, 1968
Buku Teks