editor, Owen Hargie
New York , 2006
Buku Referensi
Caesilia Ika Widanti, author
Fakultas Psikologi Universitas Indonesia, 2008
UI - Tesis (Open)
Tatum Syarifah Adiningrum, author
[Publisher not identified], 2011
Artikel Jurnal
Afia Fitriani, author
Fakultas Psikologi Universitas Indonesia, 2009
UI - Tesis (Open)
Rogers, Jenny, author
Open University Press, 2004
Buku Teks