Columbia subject headings:
Qurʼan--Sources.
Qurʼan--Terminology.
Symbolism in the Qurʼan.
Harvard subject headings:
Qurʼan--Sources.
Qurʼan--Terminology.
Symbolism in the Qurʼan.
Princeton subject headings:
Qurʼan--Appreciation.
Qurʼan--Evidences, authority, etc.