Artikel Jurnal
Fithri Rosalia, author
2001
UI - Skripsi (Membership)
edited by Arie W. Kruglanski, E. Tory Higgins
Psychology Press, 2003
Buku Teks
Spilka, Bernard., author
The Guilford press, 2003
Buku Teks
Barlow, David H., author
Thomson , 2005
Buku Teks