Howard, George S.
Jossey-Bass, 1987
Buku Teks
Ivey, Allen E., author
Allyn and Bacon, 1996
Buku Teks
Andi Mappiare A.T., author
Rajawali, 2011
Buku Teks
Craig Haen, editor
Routledge, 2011
Buku Teks
Sommers-Flanagan, John, author
John Wiley & Sons, 2012
Buku Teks