Singh, Maharaj Charan, author
Yayasan Radha Soami Satsang Beas Indonesia , 1995
Buku Teks
Fakultas Psikologi Universitas Indonesia, 2004
UI - Tesis Membership
Easwaran, Eknath, author
Gramedia Pustaka Utama , 2001
Buku Teks
Syarif Hade Masyah, author
Hikmah, 2006
Buku Teks
Trungpa, Chogyam, author
Shambhala, 2003
Buku Teks