Schroeder, Larry D., author
Sage Publications, 1998
Buku Teks
Morris, Stephen, author
Prentice-Hall, 1998
Buku Teks
O`Shea, Robert P. (Robert Paul), 1953-, author
Harcourt Brace & Company, 1996
Buku Teks
O`Shea, Robert P. (Robert Paul), 1953-, author
Harcourt Brace Jovanovich, 1993
Buku Teks
Knaflic, Cole Nussbaumer, author
John Wiley & Sons, 2015
Buku Teks