Hitt, Michael A., author
Cengage Learning, 2015
Buku Teks
Boulton, William R., author
Macmillan, 1984
Buku Teks
Cleland, David I., author
John Wiley & Sons, 1996
Buku Teks
David, Fred R., author
Prentice-Hall, 2001
Buku Teks
Hitt, Michael A., author
Thomson South-Western, 2003
Buku Teks