Rheza Amita W., author
2001
UI - Skripsi (Membership)
Vinsensia Arindita, author
Fakultas Psikologi Universitas Indonesia, 2014
UI - Skripsi (Membership)
Helen Beinart, Paul Kennedy, Susan Llewelyn, editor
BPS Blackwell, 2009
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1987
Buku Teks
Kendall, Philip C., author
John Wiley & Sons, 1982
Buku Teks