Columbia subject headings:
Shīʻah--Doctrines.
Shīʻah--Relations--Sufism.
Sufism--Doctrines.
Harvard subject headings:
Shīʻah--Doctrines
Shīʻah--Relations--Sufism.
Sufism--Doctrines
Princeton subject headings:
Shīʻah--Relations.
Shīʿah--Doctrines.
Sufism--Doctrines.