Case, Caroline, author
Routledge, 2005
Buku Teks
Siregar, Nurhalimah Br., author
Fakultas Psikologi Universitas Indonesia, 2019
UI - Skripsi Membership
Nanang Indriarsa, author
Fakultas Psikologi Universitas Indonesia, 2003
UI - Tesis Membership
Denning, Melita
Llewellyn Publications, 1993
Buku Teks
Silver, Rawley, author
Brunner-Routledge, 2001
Buku Teks