Bernhardt, Kenneth L
Bussiness Publications, 1985
Buku Teks
Bernhardt, Kenneth L
Irwin, 1997
Buku Teks
Lal, Rajiv, author
McGraw-Hill, 2005
Buku Teks
Dalrymple, Douglas J., author
John Wiley & Sons, 1995
Buku Teks
Hughes, G. David, author
Addison-Wesley, 1978
Buku Teks