Ebstein, Michael, author
Brill, 2014
eBooks
Khan, Hazrat Inayat
The Sufi International Headquarter's, 1956
Buku Teks
Muhammad Luthfi Ubaidillah, author
Program Pascasarjana Universitas Indonesia, 2004
UI - Tesis (Membership)
Naupal, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2015
UI - Publikasi
Hall, Harrison
Wadsworth, 1986
Buku Teks