Barnett, Jeffrey E., author
American Psychological Association, 2012
Buku Teks
Woody, Robert Henley, author
Jossey-Bass, 1989
Buku Teks
Seedhouse, David, author
Sage Publications, 2019
eBooks
Gillam, Tony, author
Palgrave Macmillan, 2018
Buku Teks
Morgan, Arthur James, author
Morgan/Morene, 1973
Buku Teks