Brilya Dwijayanti, author
Universitas Indonesia, 2013
UI - Skripsi (Membership)
Anderson, David R., author
Thomson, 2008
Buku Teks
Arbono Lasmahadi, author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis Membership
Coppock, Joseph D., author
McGraw-Hill, 1959
Buku Teks
Lind, Douglas A., author
McGraw-Hill-Irwin, 2010
Buku Teks