Gardner, James, author
New Page Books, 2005
Buku Teks
Thompson E. Davis III, Thomas H. Ollendick, Lars-Goran Ost, editors
[Springer, ], 2012
eBooks
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis (Membership)
Peurifoy, Reneau Z., author
Warner Books, 2005
Buku Teks
John Murray Learning, 2017
Buku Teks