Howell, Jon P., author
Prentice-Hall, 2001
Buku Teks
Henry, Anthony E., author
Oxford University press, 2011
Buku Teks
Pynes, Joan, author
Jossey-Bass, 2013
Buku Teks
Pynes, Joan, author
Jossey-Bass, 2013
Buku Teks
editors, Ronald J. Burke, Cary L. Cooper
Edward Elgar, 2012
Buku Teks