Nancy Natapura, author
Fakultas Psikologi Universitas Indonesia, 1973
UI - Skripsi (Membership)
Alan, Theresa, author
Karisma Publishing Group, 2005
Buku Teks
Dyah Puspita Asih, author
Qanita, 2005
Buku Teks
M. Asruchin, author
Universitas Indonesia, 1979
UI - Skripsi (Membership)
Al-Kandahlawy, Syaikh Muhammad Yusuf, author
Pustaka Al-Kautsar, 1998
Buku Teks