Harahap, M. Yahya, author
Citra Aditya Bakti, 1993
Buku Teks
Shaula Priatina, author
Universitas Indonesia, 1993
UI - Skripsi (Membership)
Retno Sundari, author
1993
UI - Skripsi (Membership)
Fakultas Psikologi Universitas Indonesia, 2004
UI - Skripsi (Membership)
Siti Rodiyah, author
2004
UI - Skripsi (Membership)