Nasution, Harun, author
UI-Press, 1979
Buku Teks
Terence Lovat, editor
Springer, 2012
eBooks
Fakultas Psikologi Universitas Indonesia, 2001
UI - Skripsi (Membership)
Mahmud Syaltout, author
Bulan Bintang, 1973
Buku Teks
Muthahhari, Murtadha, author
Mizan, 1992
Buku Teks