Gary Rees Paul E. Smith, editor
Sage, 2014
Buku Teks
Dreher, George F.
McGraw-Hill, 2001
Buku Teks
Pfeffer, Peter, editor
Stanford Business Books, 2004
Buku Teks
Griffin, Ricky W.
Addison-Wesley, 1995
Buku Teks
Griffin, Ricky W.
Prentice-Hall, 2002
Buku Teks