McLean, Gary N., author
Paradigm Publishing, 1991
Buku Teks
Mancuso, Joseph C., author
[American Management Association;, ], 1992
eBooks
Blake, Gary
McGraw-Hill, 1995
Buku Teks
Fitzgerald, Suzanne Sparks
McGraw-Hill, 2011
Buku Teks
Lauchman, Richard, author
American Management Association;;, 1993
eBooks