edited by Bart van Looy and Roland van Dierdonck
Pitman, 1998
Buku Teks
Hill, Arthur V., author
Business One Irwin, 1992
Buku Teks
Silverthorn, Dee Unglaub, author
Pearson, Benjamin Cummings, 2010
Buku Teks
Hill, Charles W. L., author
Houghton Miffinn, 1989
Buku Teks
Schiffman, Harvey Richard, author
John Wiley & Sons, 1982
Buku Teks